When reading prescription, how do read Jibberish to order glasses online?(lemmy.world)

You’re talking about the “weird characters” in the cylinder corrections? They are minus signs in front of the zeros. The other commentator missed them as well.

Spherical corrections are given in diopters, which are rarely outside of +9 (very farsighted) to -9 (very nearsighted) with 0.25 precision: You will only see .00, .25, .50, or .75 after the decimal point in those fields.

Cylinder corrections are also in diopters with 0.25 precision, but are usually pretty small.

Axis is in integer degrees, so will be a number between 0 and 360. This is the angle at which the cylindrical correction should apply, to correct astigmatism.

You may encounter “Add” for bifocal/trifocal lenses, which is given in positive diopters with 0.25 precision.

“PD”, or “pupillary distance” is the spacing of your eyes, given in millimeters.

Once you know what should be in each of the fields, figuring out the handwriting is pretty straightforward.

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over_clox@lemmy.worldOP

-5 points

3 months ago

I’ve already been educated. Apparently my eye doctor didn’t know how to write a fucking zero.

How am I supposed to know that weird Greek looking symbol is meant to be the Arabic numeral 0 ?

It looks absolutely nothing like a zero.

My bad, sorry I don’t know how to read chicken shit. Been wondering for years…

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Rivalarrival@lemmy.today

0 points

3 months ago

Your doctor does know how to write a zero. They did not write a zero. It’s not a “zero”. It’s a minus 0.25 and a minus 0.50.

If you don’t have those minus signs, the cylinder correction is going to double your astigmatism, not negate it.

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