The worse your eyesight is, the more your glasses will be shaped to compensate for the impairment.
#OD AND OS WHICH IS RIGHT AND LEFT TV#Think about how on tv shows the elderly are often displayed wearing glasses with thick lenses. The size, shape, and thickness of your glasses relate directly to the sphere, cylinder, and axis numbers. The combination of these three elements explains how curved and thick your lenses will need to be. There is no "bad" axis number, only different ones. Low numbers and high numbers are essentially equivalent. It indicates how much the lens must be adjusted about the axis to correct which way the light enters the eye. The axis is always on the range from 0 to 180, where 0 and 180 are basically equivalent. They have the option of writing it as a positive number, but there's a mathematical formula that opticians follow to convert their positive annotations to the correct negative ones. ![]() The cylinder is displayed using a negative number (the higher the negative number, the worse the astigmatism), unless you are seen by an opthamologist. So a spectacle prescription for one of your eyes can look like this: OD: +1.25 -2. If this appears in the 2nd and 3rd columns of your prescription, or if the columns are blank, you have no astigmatism. OS stands for oculus sinister, or left eye. #OD AND OS WHICH IS RIGHT AND LEFT PLUS#Minus prescriptions mean you are nearsighted and are able to see objects close up (and for some of the highest prescriptions, such as -15.00, the person can only see what is right in front of their face), and plus prescriptions mean that you have trouble seeing what's in the distance (beyond ten feet). OD stands for oculus dexter, or right eye.
2 Comments
Joyce
6/7/2022 10:35:37 pm
This has enriched my knowledge about eyesight! Thanks. I want to share a clinic that specializes in eye healthcare. "Eye Connection". https://www.eyeconnection.com.au They have quality optometrists and offer the widest range of glasses. Thanks again!
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