Eyeglass prescription question?
Asked by
glasses1 (
10
)
September 9th, 2012
My prescription is as follows:
OD: SPH:-2.50 CYL: -3.75 Axis: 179
OS: SPH:-2.50 CYL: -4.00 Axis: 176
I am trying to order glasses online and the company that I would like to order from only makes the CYL part of the prescription up to -3.75, if I substitute the -4.00 in the left eye for -3.75 will this cause me problems?
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4 Answers
Welcome to Fluther.
I am not an optometrist, but I think it’s plain that you need to get the prescription as written by your doctor. I wouldn’t make any substitutions at all.
It probably won’t hurt (the difference is something like ¼ of a millimeter. Your eye will compensate.
However, there is one additional number you will need – the PD – Pupillary distance – basically the number of millimeters between the pupils of each eye. If you don’t have that, you will run a serious risk of getting glasses that don’t work.
By the way, I just bought an online pair from Zenni Optical – it came in about 8 days, perfect and to spec. And cheap. $39 for a pair that would have been $129 (at least) at lenscrafters.
I’m not an eye doctor either, but you have a fair amount of astigmatism along with moderate near-sightedness. The quarter-diopter error probably won’t matter, but you won’t have your sharpest vision. I’d spend a little extra for a good optician (online okay, I guess) who can properly fill the prescription.
Honestly, I’ve been wearing glasses since I was ten years old, and am currently cycling through several old pairs since I haven’t been able to afford new ones in some time. I can totally tell the difference between my newest pair (-3.50R, -3.75L) and my next older pair (-3.50 both eyes).
It’s not really noticeable, but my eyes get tired really quickly with the older pair.
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