Author Topic: Over-Prescriptions - for Astigmatism - and OD mistakes.  (Read 996 times)

Offline OtisBrown

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Over-Prescriptions - for Astigmatism - and OD mistakes.
« on: February 24, 2014, 08:04:37 AM »
I like to be in personal control of my own measurements.  I do not like to be treated as an "ignorant person" have a lens "prescribed" lens prescribed that is excessive.

It has proven impossible for me to "negotiate" a reasonable lens - if I read the 20/40 line.  I get insulted if I "ask" for a reduced prescription, of if I read 20/40 - no prescription.

I recommend that a person learn enough about these measurements to do them at home.  A Snellen costs nothing - but you need it at home.  You MUST pass the 20/40 line - eventually.  Here is a video of that "measurement process".

I personally think it always produces an "astigmatic" prescription, far in excess of anything that is necessary.  I am not "hostile" in any way.  But I just do not think they take enough time to determine my visual acuity accurately.  Perhaps the "pressure" in an office is too great to take the time to do that.

I ALWAYS insist in a "spherical lens", i.e., no astigmatism.  I check this at home - with my own Snellen and lens.

It is a waste of my time to attempt to "argue" with this optometrist about the means *I* must use to keep my vision at 20/20.  If I do that (by wearing a plus for close work), and always passing the 20/20 line - then I do not need and optometrist.

I do not mind measurements like this OD is making - but I always check at home.  I know of many people who pass the DMV (20/40) line, who are prescribed -1 and -2 diopters lenses - with a great deal of astigmatism.

Look at the OD's measurements using her "trial lens" frame.  It is very difficult to get any meaningful measurement.  That is why I doubt the value, or even the worth of "astigmatism", if you can read the Snellen charge with out it.

« Last Edit: February 24, 2014, 11:05:22 AM by OtisBrown »