Why do people loose their 20 20 vision? Why doesn't it get better? How fast you !
Question:
Why do people loose their 20 20 vision? Why doesn't it get better? How fast you loose sight depends on what?
Additional Details
1 week ago
I'm looking for the mechanics of it you know like as time goes by your eye tissure wears away? you for little benign tumors in your eye? what is it? thank you in advance
Answers:
Do you mean they need glasses to get to 20/20 or that even with glasses they can't get to 20/20?
Needing glasses is due to a mismatch between the various optical components of the eye. Either the cornea grows a little too flat or too curved, or the lens inside the eye is a little too flat or too curved or the total length of the eye is a little too long or too short to work with the other elements. This is primarily a genetic factor, just like your nose shape or ear size. Generally, most people's need for glasses stabilizes between age 16 and 25 and they stop needing stronger and stronger glasses.
People who cannot achieve 20/20 even with glasses have had and eye injury or eye disease that interferes with vision. There are hundreds of different eye diseases with many different mechanisms for causing the vision loss, many different rates of progression and many different factors controlling the change.