Re: Converting "Script" to pure Spherical Equivalent


In fact, with a prescription that is almost "plano", you might
find that your vision has cleared from the last prescription.

To check, just click on:

http://www.smbs.buffalo.edu/oph/ped/IVAC/IVAC.html


And then click on "Display", and read the chart.

Your vision might be better than your "prescription" might
suggest.

Always good to double check these measurements.




On Apr 26, 9:31 pm, "otisbr...@xxxxxx" <otisbr...@xxxxxx> wrote:
Also, you can "round-down" to -1/2 diopters.

If fact, you might be over-prescribed to a certain extent.

You could check a Snellen and determine your
actual visual acuity.

In fact, during your exam you might have developed
muscle-spasm myopia, which I am told gradually
reduces over time.

Otis

On Apr 25, 11:40 pm, "otisbr...@xxxxxx" <otisbr...@xxxxxx> wrote:



Converting a prescription to the power I would need in a regular lens
or if someone could
figure it out I would greatly appreciate it.

"Sphere", Astigmatism

Left sph -.50 cyl -.75 ax 170

Right sph -.75 cyl -.75 ax 170

To convert take 1/2 the astigmatic part
and add it to "sph"

for the Left, then

-0.75 / 2 = -0.375

-0.5 -0.375 = -0.875, Spherical Equivalent

You can round this off to -1.0 diopters.

You prescription is weak, with you
Snellen about 20/30 to 20/40.

You can check with your OD to see
if this meets your needs.

Otis- Hide quoted text -

- Show quoted text -


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