Termyn8or
Posts: 18681
Joined: 11/12/2005 Status: offline
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I looked at your photo and I can tell that you are not nearsighted, at least to any great degree. At your age you're not presbyopic so therefore you are either farsighted or near neutral. If neutral that means your glasses correct astigmatism, which affects visual accuity at all ranges. What alot of people don't know and even an optometrist may miss is that astigmatism can be different at different ranges. Mine is because there is some tearing of the lens'es suspensatory fibers. The best way to describe astigmatism without a trip to wiki is this : The eye focuses this : \\\\\\\ \\\\\\\ \\\\\\\ at a different length than this : /////// /////// /////// Sometimes astigmatism is caused by an anomality in the shape of the eyeball or a corneal abberation, in these cases it is constant. But if it is caused by the lens itself or it's suspension, it is likely to change at different ranges because that is when the tension on these parts varies. Usually it is the magnitude rather than the angle that varies. I don't remember exactly how to decipher the numbers, but there is OD and OS. OS is your left eye. There will be a number first, that is the lens power, a positive number lens corrects hyperopia and a negative number correct myopia, which are farsighted and nearsighted respectively. Next come the numbers for the astigmatism. There seem to be some strange reasons for astigmatism to change, for me, now that I notice it, it seems to vary day to day alomst. Some days are better than others. there must be some factors I just don't know. I'd bet that could be true for alot of people and if so - get your eye exam on the wrong day and it could be off. Wiki has a pretty good page on this if you care to read through it all. http://en.wikipedia.org/wiki/Eyeglass_prescription It's an advantage to know about these things, how your body is. Like you might try to learn some things about feet to discuss with your foot doctor. Or learn things about sound to talk about with your ear doctor and so forth. Why do I know about optometry ? My whole family wears gllases, contacts or gets Lasik. One of my actual phobias almost is of being blind. Therefore I have studied a bit about it. Actually, I think people should not get new glasses every year. I say get them when you need them. If your eyes start watering alot, or things are blurry then get an exam. If you have your old prescription (you should keep all of them) you can see what changed. If the change is minor and you just went in for the hell of it, you might just want to stick with the old prescription. Of course they do wear out eventually anyway. I really hate to bring up the fact that they are out to make money. I don't mean to actually make an accusation here but the doc is the one who writes down those numbers, no way in hell anyone could ever know if even he intentionally made a mistake. Again - no accusation, just realize that it is possible. T^T
< Message edited by Termyn8or -- 11/13/2011 11:00:51 AM >
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