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Are There Two Ways Of Measuring Axis Of Eyes?
Are there two ways of measuring axis of eyes? I visited one optometrist and he wrote axis as od=70 os=120; but another wrote it as od=160 os=20 and today one wrote it as od=165 os=15. All of these exams were in the space of three months even though I am not experiencing abnormal vision problems--just want a pair of glasses which fit.
Mon, 21 Jul 2014
Hello,
Yes, there are two ways of expressing the cylinders and their axis. These are opposite signs at right angles. For example a -2.00 cyl at 70 axis is the same as +2.0 cyl at 160 axis. Some countries write the former while some write the latter. But they are the same.
Regards
Yes, there are two ways of expressing the cylinders and their axis. These are opposite signs at right angles. For example a -2.00 cyl at 70 axis is the same as +2.0 cyl at 160 axis. Some countries write the former while some write the latter. But they are the same.
Regards
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