Discussion in 'Photography' started by Paul Furman, Apr 8, 2009.

  1. Paul Furman

    Paul Furman Guest

    Long post, should be of interest in regards to optics for even
    photographers who do not wear glasses (yet).

    I got new eyeglasses today, progressive bifocals (no line) and the
    auto-tint sunglasses thing this time (Reactint grey poly). Vision is
    very important to me and I asked a lot of questions, so this is my
    summary to share and I would like to know anything folks here have to
    add, confirm, dispute, or comment on.

    The appointment was at the chain store Lens Crafters (EyExam of
    California) and I was a bit concerned about the rushed factory precision
    with which my exam was executed... I know I'm being picky but it seemed
    my questions were an unwelcome intrusion in their system... anyways,
    that's just a personal annoyingly picky observation - the price was
    right, fast convenient service and pointed glam treatment like I was a
    movie star coming in for a face lift. That is obviously part of the
    emmployee training. I only got glasses the first time 3 years ago at the
    same place so this is only my second such appointment ever. No
    insurance. $600 including $100 more for somewhat 'designer' frames,
    progressive bifocals & auto-tinting sunglasses effect. I tend to avoid
    doctors, dentists & such and do not generally trust them.

    It's nice to have a new prescription, it really matters to me to be able
    to see everything clearly. I lost one lens out of the old pair & have
    been struggling with makeshift walgreens reading glasses & such for a
    week (UGH!). The last set was uneven for left & right for a reading
    distance of what I'm now told is tested at 16-inches, this exam came out
    the same for both eyes. Testing them now... looks like the right eye is
    not as sharp at that 16-inch distance... hmm... OK that's my first
    intuitive test, now I see that tilting up fixes the problem in the right
    eye but not symmetrically.

    Here's the (confusing) data:

    sph cyl axis prism add (add for distance)
    +1.00 -0.50 157 +1.25 (right)
    +0.50 -0.50 077 +1.25 (left)

    sph cyl axis prism add (add for reading)
    +025 PS +1.50 (right)
    +025 PS +1.50 (left)

    Note the difference: (add for distance)/(add for reading)
    -perhaps I wrote it down wrong in 2006?
    For this one I confirmed the math for reading glasses:
    +025 distance plus +150 = +1.75 (in walgreens reading glasses terminology).

    Last time, I was told I had an astigmatism in one or more eyes, I don't
    recall. That seems to be the cyl/axis data? My observations above about
    tilting and asymmetry suggest an asymmetry for which I don't have the
    knowledge to describe properly. Do the 2006 numbers explain that or some
    other situation? Should I complain that this exam was not accurate
    enough, or just pay more for a more custom service next time? They said
    something about a free adjustment appointment in a month or something
    like that...

    I didn't like the quick lens switcharoo testing method, I would have
    preferred a focus ring that I could control. Sometimes I need to focus
    (mentally) on different aspects of the experience, and coordinate with
    the optician's timing which was a bit of a struggle and I wasn't always
    convinced that the test was nailed in such a fast-paced one-chance
    interaction. I would have liked to understand better when we were
    looking for astigmatism or whatever it was, rather than just answering
    yes/no. I would offer to tip them $50 or whatever... to go a little
    slower <g> if it helped.

    Distance acuity is measured at about 20 feet, through a mirror in a
    10-foot room. Infinity is considered close enough to that, so it's not
    worth testing or perhaps impractical indoors. Those are the only
    distances tested. Anything else can be accomplished by tilting the
    progressive bifocals. I asked about closer distances, the reply seemed
    to be that was just impractical plus my bone structure places my eyes
    relatively far apart and in a cross-eyed test I was unable to align my
    eyes any closer than about 16 inches. This was a noticeable 'fail' in
    the test sequence. The question was asked if I sometimes see double
    (yes). I have a very difficult time viewing stereo pair photographs,
    it's near impossible for me without some kind of aid.

    I asked, "what about optimizing for photography and or computer work,
    because that's super-important for me?" I edit photos on a 26-inch
    monitor at 20 to 34 inches away, and it's my understanding that an SLR
    camera simulates a focal distance of about 30 inches. And what about
    closer viewing, like examining plant specimens for identification? At
    45, I miss not being a little kid with razor sharp vision :-( The reply
    was that I could get another pair of glasses optimized at that range,
    even progressive bifocals between that range.

    My right eye is dominant. I guess that's normal for right-handed people.
    The asymmetry however seems to give a sharper image at the 30-inch range
    in my left eye which seems unfortunate. One interesting test result
    regarding eye dominance was the peripheral test where you stare at a dot
    and click a button when you detect the machine's twitching subtle
    peripheral flashes... on the left eye, the right part of my field of
    vision blacked out sometimes. Apparently this is not unusual, blinking
    restores the black area. What's going on is my mind says the left eye
    doesn't need to worry about the right side so it literally blacks it
    out. It's fascinating how much of our vision is the result of our
    brain's interpretation. It's hard for me to judge things sometimes
    because my brain is messing with reality & making all sorts of
    assumptions & corrections that I'm not aware of. Interesting.

    Last time we talked about anti-scratch coatings because I work outside
    with muddy hands all the time. I don't know what I got this time. I
    asked about glass versus plastic again, because glass is more durable.
    The warning was even more severe this time about glass being a hassle
    for them and the risk of eye injury in an accident if they broke into
    shards. I'd be willing to risk that for better optics, I scratch them to
    hell in no time and that's no fun to look through scratched glasses or
    replace every 6 months. I wonder about anti-glare coatings too, now that
    I think of it. That's a big deal on camera lenses. I'm not independently
    wealthy but my vision is extremely important to me and I'd be willing to
    pay for improvements on my eyeglasses. Maybe I can keep these for backup
    and dirty work and get a better custom pair as a more informed consumer?

    They had a new gizmo that photographs the retina to look for diseases &
    stuff. I came out OK on that. I asked to have the images emailed to
    me... not yet... What it does is shoot through the pupil (black center
    opening in your eye) & shows the retina (inside surface of your eye)
    where the image is captured in your eye. It just looks like blood
    vessels plus the macula: http://en.wikipedia.org/wiki/Macula I forget
    the term for the gizmo, there was a video about it in the waiting area.

    I asked if I wanted a custom pair of glasses for that distance, the doc
    said +1. I have a Canon 500D closeup filter which is +1 diopter in 35mm
    SLR terminology, at 24 inches from my screen it looks fantastic through
    my right eye. On the left eye, I have to hold it about 2 or 3 inches
    away from my eye. The closeup lens looks much sharper than my new
    glasses. Maybe it would be nice to have another pair just for computer
    use. The Canon 500D closeup is a nice big 2-element piece of glass. It's
    probably unreasonable to expect a pair of multi-purpose eyeglasses to
    match that performance but if so, that's a shame.

    I bent the frames a bit so they sit tilted slightly to correct for the
    asymmetry. The lens over my right eye is a bit higher now. Try testing
    your glasses this way, covering each eye with your hand.

    I brought my camera in, explaining that was something important to my
    needs and met confused blank stares from both people I talked with. I
    could have tested the text size charts with the camera for hours to get
    it right <g>. Maybe there's a way to come up with eyeglass prescription
    data myself?

    Paul Furman

    all google groups messages filtered due to spam
    Paul Furman, Apr 8, 2009
    1. Advertisements

  2. Paul Furman

    TonyCooper Guest

    A word first...I am retired, but I spent my working career in the
    field of medical instrumentation. I sold medical equipment for
    several years, and then started my own company as a distributor of
    medical equipment. One of my primary suppliers was Carl Zeiss, Inc. I
    sold and distributed Zeiss Operation Microscopes and Slit Lamps. (I
    wasn't involved with Zeiss laboratory microscopes. Just the ones used
    in surgery.) I also sold and distributed lasers used in eye surgery.
    I mention this to show that I have more than a passing knowledge of
    the field.

    I would never have an optometrist do my eye exam. I have them done by
    an opthalmologist (an M.D.) because part of the process should be a
    medical examination. My prescription is determined by an optometrist
    who is on the opthalmologist's staff, but the examination is done by
    the opthalmologist. The medical exam and the prescription
    determination are two different things.

    I would never have my perscription filled by the opthalmologist's
    office. I ask for it, and take it to a place like Lenscrafters to be
    filled. The on-site opthalmologist's lab charges far too much for
    glasses. Ridiculous.

    I currently have three pair of glasses: a pair of bifocals for
    ordinary use, a pair of tinted prescription bifocals (sunglasses), and
    a pair of single-vision computer glasses. I also have a SCUBA dive
    mask with a prescription lens.

    Bifocals are set to the working distance you assume for close work.
    Reading, for example. Because my computer screen is a different
    distance from eyes than I would hold a newspaper or book, my computer
    glasses are what would be the bifocal part for this distance. I can't
    see across the room in them, but the screen is sharp and clear.
    Because all of the lens is the same prescription, I don't have to tilt
    my head when viewing the monitor.

    There are some other points in your post I disagree with, but they are
    just points of personal preference. For example, I prefer the
    super-thin plastic lenses (scratchproof coated) because they are
    lighter and more comfortable. I don't like the auto-tints because
    they are not effective as sunglasses and change too slowly when you
    come out of the sun. Your milage may vary.

    You do want that fast switcheroo, by the way. That's the way vision
    works. When your view changes from your wristwatch to something
    across the room, you don't dial in the new setting. The eyes
    instantly re-focus and the test replicates that.
    TonyCooper, Apr 8, 2009
    1. Advertisements

  3. Paul Furman

    TonyCooper Guest

    I'm well aware of that.
    And that. The question in my mind is how capable he is in performing
    the medical screening, and how extensive the screening is. Also, I
    prefer the consulting be done in conjunction with the visit.
    No, I wouldn't be. Not after the hundreds of hours I've spent with
    ophthalmology residents in medical schools. In fact, the
    opthalmologist I go to now I first met when he was a resident.
    Perhaps you read my post without your glasses and missed the part
    where I said: "My prescription is determined by an optometrist
    who is on the opthalmologist's staff, but the examination is done by
    the opthalmologist. The medical exam and the prescription
    determination are two different things."

    It's still there. Above.

    I don't consider what the optometrist does as an "examination"
    because, to me, the medical assessment is the examination. The
    optometrist is basically a technician.

    I go to an opthalmologist because he *is* trained on eye disease and
    pathology. The opthalmologist employs the optometrist because he
    (actually, it's a she in my case) *is* trained in vision correction.
    That's a personal choice, but one I wouldn't subscribe to. I wouldn't
    want the extra weight. If it doesn't bother you, that's fine though.
    My insurance covers the cost of the visit to the ophthalmologist and
    the fitting by the optometrist, but not the lenses or frames.
    Personal choice.
    It's up to Paul to use who he feels comfortable with. I feel more
    comfortable using an opthalmologist. If he heeds your advice to seek
    a "quality professional", I personally feel he's more likely to find a
    more qualified optometrist who works for a opthalmologist than he will
    in a chain store outlet.

    I think the chain store outlets like Lenscrafters are quite capable in
    filling perscriptions, though. My own glasses are not from
    Lenscrafters, but they are from a similar place.

    On the subject of laser surgery...I don't feel that it's a vanity
    issue. The benefits are more in convenience than vanity. My daughter
    had it done, and wishes she hadn't waited so long to do it. She wore
    contacts and had nothing but problems with contacts. You might say
    that contacts are a vanity choice, but she's active in sports, lives
    in a beach town, and spends quite a bit of time out on the boat. The
    laser surgery freed her up.
    TonyCooper, Apr 8, 2009
  4. Paul Furman

    jimkramer Guest

    Welcome to middle age. :) I've worn coke bottle bottom glasses since I was
    in first grade. I am incredibly nearsighted and have a horrible astigmatism
    in both eyes. I have, until 2006, always worn glass lenses, from about 14
    up I have always gotten the photo gray lens. In 2006 I tried the plastic
    lenses, mostly because the Dr. finally convinced me to try the new
    hi-refractivity materials to make the lenses look thinner.

    The plastic lenses were fine for about 6 months and then the fine scratches
    became noticeable on inspection, but did not affect my vision noticeably. It
    took 2 years before the plastic lenses were bad enough that I wanted to have
    them replaced. The $20 "insurance" was well spent at the time of purchase,
    but my vision of replacing the lenses every 3 months never happened.

    I have never broken a glass lens. So unless someone is trying to plug your
    eye socket with a .45, I think the concern from breakage is unrealistic.
    Glass is more expensive than plastic, both in raw materials and
    manufacturing the lens.

    The anti-scratch coating typically includes an anti-reflective coating, if
    you want anti-glare you need to polarize the light.

    Eye dominance has nothing to do with handedness. I'm right hand, left eye.

    Yes you should still probably have a correction for astigmatism. Take them
    back and have them fixed.

    jimkramer, Apr 8, 2009
  5. Paul Furman

    jimkramer Guest

    Maybe in your hemisphere, but $600 is pretty steep in the US, especially for
    a very minor correction. I just assumed it was a California Price Special.
    Paid $425 for mine with all the goodies and titanium frames.
    jimkramer, Apr 8, 2009
  6. Paul Furman

    J. Clarke Guest

    I didn't pay that much for prescription goggles with two sets of lenses
    (clear and polarized).

    Now if you're talking prescription Serengetis . . .
    J. Clarke, Apr 8, 2009
  7. Paul Furman

    Martin Brown Guest

    Don't you actually get a prescription certificate of the test?
    In the UK you can then take the prescription to any optician you like,
    and not necessarily the one that did the test.
    Seems a bit steep for what are little more than a pair of overpriced
    designer framed reading glasses (at least if the 2009 prescription is to
    be believed). My own optician now has a direct laser speckle measurement
    system that is surprisingly accurate and much quicker. He reckons it is
    also more reliable since with the classical test methodology so few
    people answer all his questions correctly.

    Measured Sph +0.25 on its own would not normally be worth correcting
    never mind having varifocal lenses. I didn't get reading glasses until
    my arms were not long enough to obtain focus which was about Sph 0.5.

    Incidentally I hope the US test includes a routine check for glaucoma if
    you are over 40 (it wasn't mentioned).
    A photographer with a lens chart or similar test piece should be able to
    tell if their sight is astigmatic in low light. Text will seem blurred
    in one direction and sharp the other.

    A quick and dirty test would be how well can you read fine print close
    up and larger print at a distance with the old glasses and the new ones.
    If the old ones give an obviously sharper focus then you have been had.

    Martin Brown
    Martin Brown, Apr 8, 2009
  8. Paul Furman

    Paul Furman Guest

    $100 for the exam (could have been less without being dialated).
    $200 for the designer frames
    $310 lenses "Reactint Grey (Poly), Progressive - Illumina"
    (includes $130 extra for auto-tint and $100 off for complete pair)
    -progressive bifocal is more than straight scrip.

    Right, we did that test & the horizontal lines were thicker. So, why
    doesn't my scrip show that? There were a few switcharoos though & I
    wasn't following what was going on, just yes/no, rush along...

    Could be a chance to complain about missing astigmatism though, and/or
    asymmetry at computer distance. I didn't bring my old scrip because I
    assumed they had it on file but they throw them out after 3 years (no
    digital records). Also I was told during the exam that there was no
    correction needed at a distance but the scrip shows otherwise. I was
    never convinced that the old ones improved distance, maybe at 5 or 10 feet

    I think the best for camera use is the progressives because I can see
    the world and the LCD and the focus screen though there is a diopter
    adjustment on the viewfinder. I just checked that with the new glasses &
    one notch plus improves things. Two notches plus without the glasses. If
    I use the +1 closeup lens as eyeglasses: minus one or two notches (hard
    to tell the difference because it's sharper so the astigmatism is more

    Yeah, I've got a little 10x folding triplet hand lens but still miss
    having the eyes of a child :) The hand lens is a hassle to pull out &
    remember to bring. Some maps have extremely small text, try reading
    those at night in the car while driving!

    Paul Furman

    all google groups messages filtered due to spam
    Paul Furman, Apr 8, 2009
  9. Paul Furman

    TonyCooper Guest

    In my case, I do read without my glasses. The eye changes shape as
    you age, and it is that change in the curve of the eye that determines
    if you need bifocals. My age-flattened eyes focus precisely at my
    reading distance. It the slightly longer distance that gives me
    problems. I can't, for example, see my car's dashboard instruments
    clearly without bifocals.

    At one of the national meetings for ophthalmologists where I was
    working the Zeiss booth in the exhibition hall, I sat in on a meeting*
    where the Russian doctor Svyatoslav N. Fyodorov was speaking. He was
    the surgeon who did the first work in radial keratotomy**. In the RK
    procedure, the cornea is cut with a knife so that the eye is re-shaped
    in healing.

    Fyodorov told the fascinating story of how he observed that a Russian
    pilot's vision changed after corneal damage caused by a bird going
    through his plane's windscreen. Fyodorov then developed the procedure
    of deliberately changing the curvature of the cornea to change vision.

    While the RK procedure is not the surgery of choice anymore, the LASIK
    (laser) method is based on the same idea. Just the tool to make the
    incisions has changed.

    Fyodorov was very interested in aviation, and wanted to be a pilot.
    But, he lost a foot in an aviation school accident and went on to
    medical training. Ironically, he died in a helicopter crash.

    * Vendors are not usually allowed in the medical meetings. However,
    Fyodorov was closely associated with Zeiss, so they let some of us
    with Zeiss badges into the hall.

    ** It had been observed much earlier by other doctors that the
    curvature of the cornea determined vision, but Fyodorov was the first
    doctor who determined how a specific pattern of cuts to the cornea
    could result in predictable corrected vision.
    TonyCooper, Apr 8, 2009
  10. Paul Furman

    Viperdoc Guest

    With progressive lenses, most rx's will add another 0.5 diopter (to the add)
    to improve the correction for close vision. Otherwise, the progressives may
    not give enough correction. A quarter diopter difference is minimal.

    Progressives do take some adjustment- the transition from distance to near
    in the middle of the lens is shaped like an hourglass, so off axis requires
    more head turning.
    Viperdoc, Apr 8, 2009
  11. Paul Furman

    TonyCooper Guest

    I suppose I could find a frame where the cost of frame and lenses
    would be $600, but I've never noticed that shelf in the optician's

    Glasses in this area start at $100 for a basic frame and single-vision
    lenses . There are extra charges for bifocal, anti-scratch-coating
    and anti-reflection. Some of the chain opticians (like Lenscrafters)
    offer specials on two or more pair with a limited selection of frames.

    The above does not include the eye "exam", but some optical stores do
    not charge for an eye exam. Some do.

    I wear titanium frames with the lenses held in place by fishline
    instead of the frame going all the way around the lens. I think the
    frames were about $150 (lenses extra) but there was a discount for
    buying three pair at once (regular, tinted, and computer glasses) My
    computer glasses are standard el-cheapo frames.

    My wife's frames were more (but not at the $600 level), but she has
    "designer" frames. To her, glasses are face jewelry that improve
    vision. Her total cost was around $450 or $500, but she has
    progressive bifocals and that adds to the cost.

    I don't have the progressive lenses. I've never seen that as an
    advantage, and the bifocal "line" doesn't bother me.

    My biggest problem with glasses is that I wear single-vision glasses
    when I'm on the computer, and these glasses have what would be my
    bifocal prescription as the full lens. My distance vision is fuzzy
    with these glasses. Sometimes I forget to change glasses when I leave
    the computer and walk around the house in these glasses. Everything
    is blurred.
    TonyCooper, Apr 8, 2009
  12. Paul Furman

    Paul Furman Guest

    Downtown San Francisco location.

    Paul Furman

    all google groups messages filtered due to spam
    Paul Furman, Apr 8, 2009
  13. Paul Furman

    Martin Brown Guest

    In Europe they also do a specific eyeball pressure test and the whole
    eye test is free for anyone with a family history of glaucoma.

    In the UK it is usually done by a mildly annoying device that blasts a
    pulse of air at your eye and measures the deflection. You would remember

    Compared to the more accurate method used when I lived in Belgium that
    required full eyeball contact with a microscope. I think I prefer the UK

    Martin Brown
    Martin Brown, Apr 8, 2009
  14. Paul Furman

    ray Guest

    FWIW - I had reading glasses first prescribed several years ago at the
    onset of presbyopia. A couple of years later I needed a change. Since my
    distance vision has always been fine (except for a period when I was
    diagnosed with diabetes which was out of control), I opted for a pair of
    bifocals with top half optimized for compter distance and bottom half for
    reading distance. I chose a pair of bifocal presciption sunglasses with
    the top half having no correction and bottom half way between the other
    two prescriptions - works great for seeing the dashboard.
    ray, Apr 8, 2009
  15. Paul Furman

    TonyCooper Guest

    In my experience in the US, that's always part of what is done by
    either an optomotrist or an opthalmologist.
    Slit lamps used to be equipped with a Haag-Streit tonometer. It's a
    device that presses against the eye and measures the rate of outflow
    of ocular fluid to determine if the canal is blocked; an indication of
    glaucoma. The air-puff tonometer is more commonly used here now, but
    it works on the same principle.
    TonyCooper, Apr 8, 2009
  16. Sorry if any of this repeats anything covered earlier..., and also
    sorry if some comments offend (I *do* have my strong opinions
    on glasses, and how they SHOULD be made...! ;-). See
    for my approach...
    I detested "no-lines", with their poor peripheral sharpness and
    "depends on the tilt" focus - bleah! I had made four distance lens
    corrections (as described in the article above), with the bifocal
    insets made smaller and lower than usual (for good "ground
    visibility". The flat-tops were properly angled to be invisible
    (helped by the nearness of the two powers within a frame side).
    Ugh! Sorry! (I could never understand the appeal of "sun" glasses
    since they tend to modify colors away from natural, and unless dense,
    polarized, UV-filtering, and multicoated, there is little to no "protection".
    Um, I did warn you......! ;-)
    I've had exams and also glasses made at such places and I would
    say the work was about 50% OK, 50% useless. One time, I met
    someone else wandering around the mall also "lost", and we quickly
    established that we had come from the same optical place with the
    same problem - the glasses were obviously wrong! I went through
    their "rote - no questions permitted" exam three times, with the same
    wrong outcome! Another place, when I requested to have a pair of
    reading/computer glasses made (I usually set these for 1.5 and 2
    foot distances), they put the distance prescription in one side, and
    gave me the usual nonsense, "Wear them a while - you will get used
    to them". Golly, gee!!!
    Yuh wuz took! 8^(
    I understand, but there are good ones around - and for doctors,
    ask friends, for dentists, do the same plus anyone you see with
    good teeth, and for optometrists, the same...;-) THE VERY BEST
    eye person I've been to was --
    A) VERY thorough, and took his time (and did testing beyond the
    usual, like red/green astigmatism)
    B) Let me control the apparatus when I wasn't sure of a setting
    C) LISTENED TO ME!!! (I wanted those unusual 4-distance glasses)
    D) Didn't insist I had some weird disease I knew I didn't (one
    big-time doctor did...)
    E) Easily spotted the "fixed" floaters in my focus that bother me
    (the big-time doctor couldn't see them...)
    F) Let me take diopters outside with my camera (which had no
    adjustable eyepiece diopter) to check camera focus
    G) Was nice, completely accommodating, and the work was excellent
    H) The prices were a fraction of yours
    I0 Is in my home town, and easy to get an appointment with
    Too close, if you read on your lap or use a computer, but you can
    have a second cheap pair made for that.
    This doesn't look right at all between the two times. I would consider
    having the test done by someone good, then taking the results back
    and requesting a refund.
    The former, not the latter...
    There is nothing to adjust here - and they mean the fitting of the
    frames, not what really needs doing!
    The final lenses are supplied in incremental powers, so an infinitely
    adjustable testing gizmo would not be useful - and sometimes
    quick changes are better so your eye/brain doesn't accommodate
    too much...
    They should have permitted "redoes" when unsure...
    "Slower" should be available in terms of repeats.
    You may need (and I prefer) to have the near distance setting placed
    further out...
    One meter...
    Or use a hand magnifier. I once tried frames with a second set of lenses
    that flipped down, but without multicoating, the reflections were excessive.
    See various articles on my web page...;-)
    Don't make this assumption anymore. The newer plastics are VERY
    durable, and lighter and safer than glass. I would never go back to
    glass again.
    If you need to do this, uncoated simple bifocals may be the way to
    go (cheaper).
    As with front filters on camera lenses, I'm not convinced that
    multicoating on glasses offers much of value...
    Good luck!
    David Ruether
    David Ruether, Apr 8, 2009
  17. Paul Furman

    K W Hart Guest

    My last two or three exams were at the WalMart Vision center. The exam
    (including the air puff, and the blinking dots) was about $100, and my
    contact lenses cost about $35 each, $70 for the pair. I also suffer from
    "short-arm-syndrome" and with each exam, I ask about options. The examiner
    (I don't know off-hand if he's an MD or not) has advised against monovision
    (one eye corrected for distance, the other for close-up), and most recently
    he advised against multivision contacts, as they tend to pop out- they are
    thicker at the outer edges. He has always suggested that I go over to the
    'drugs' area of the store and check out the reading glasses. I have always
    had good success with the cheap 'cheater' glasses at +1.5 or +1.75.

    I quit wearing glasses back in the 1970's, and I do not want to go back to
    them. I've worn contact lenses daily since then, with little problem. The
    best lenses for me were the rigid 'gas-permeable' type.
    K W Hart, Apr 8, 2009
  18. Paul Furman

    -hh Guest

    Last time I was in, for just over $300 for a new set ('respectable'
    frames & lenses), but my lens perscription is pretty nightmarish for
    opticians: in addition to myopia (around -4) and astigmatism and
    bifocals (presbyopia) and "transitions" photo-sensitive tinting (for
    stigmatism), the whole shooting match has 6 degrees base out prism
    (muscle imbalance; lazy eye runs in the family). I resisted going
    from glass to synthetic lenses for a long time, but I'm satisfied with
    the trade-off between reduced scratch resistance and a lot less

    This $300 was just the glasses - it doesn't include my Opthamology
    exam, which was extra. I'm now due for a new pair of glasses, so I
    can update prices in a week or so.

    -hh, Apr 8, 2009
  19. Paul Furman

    Charles Guest

    My experience is that the optometrists use the air puff and the
    ophthalmologists use the device that presses against the eye. Makes
    sense that the optometrists who are not MDs, don't use the device that
    touches the eye since for that device you have to get medicine, eye
    drops. I think they are numbing drops.
    Charles, Apr 9, 2009
  20. Paul Furman

    Paul Furman Guest

    I got that air puff! And a bunch of different tests...

    Paul Furman

    all google groups messages filtered due to spam
    Paul Furman, Apr 9, 2009
    1. Advertisements

Ask a Question

Want to reply to this thread or ask your own question?

You'll need to choose a username for the site, which only take a couple of moments (here). After that, you can post your question and our members will help you out.