The doctor pushed my lens to the limit

I wanted to share an experience from about 10 years ago. I visited an ophthalmologist which I had seen referenced as friendly on a Bates website. Indeed he gave me a reduced correction for closeup. He also mentioned that lasik wasn’t a good idea because it complicates treating cataracts later in life.

But this doctor did a sort of test which kind of scared me but which I found very interesting as well. On that day, he measured that my correction to see 20/20 was -6.25 and -6.75. But after this, he tried to see how strong of a correction with which I would still be able to read 20/20, with my lens working to accommodate. It got as far as -20! The purpose wasn’t to prescribe me this over correction, as I left his office with the -6.25/-6.75 correction and another reduced one for closeup. Maybe he was trying to see how well my lens could accommodate?

But I found it interesting because it made me think of optometrist visits as a child, in which I remember the doctor continually putting stronger corrections and asking if it were “better”. I think I kept saying yes each time until I detected a worried or disapproving reaction from the doctor. I probably could have had a weaker correction as a child if the doctor just stopped as soon as I could read the 20/20 line.


More like how much torture it could handle. With my most recent opthalmo visit, the assistant got rather ratty with me when I insisted that one test lens gave me the same acuity as another (on a projected screen in a dark room). She kept on saying ‘but they are different’. I didn’t get any glasses on the basis of their prescription - had gone only for the ‘physical’ aspects of the examination as in the meantime I had learned how to calculate my own diopter needs on Endmyopia.


Fascinating! They never actually explain what ‘better’ is meant to be like either… smaller is not necessarily any less blur or better… it just means more minus!

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I insisted that one test lens gave me the same acuity as another

I wonder if the difference was in astigmatism. I remember a few exams where it was difficult for me to determine which of two lenses was “better”. They were different, but hard to tell which was better. I think in that case they were testing astigmatism. When it’s just bumping up or down the spherical correction, the change in acuity is more obvious.

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Yes, she was testing astigmatism - but then she should be aware of this issue, and not get ratty about it. Probably pressure of time, as this practice was run like an assembly line. I suppose this is how lens induced astigmatism can be easily created. I came out of it very happy, nevertheless, to hear that there were no physical problems.


My doctor done that also. Unfortunately I can’t go further than -2 or -3 more than first match.
Having trouble to see near objects with both eyes with either full or not full (20/40) correction glasses.

At start of vision therapy my accomodation range measured as 0, so R sph -10.5 and L sph -11 was first and last 20/20 at doctor’s test lens kit.

My glasses power is -9 and I am 16.

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