During nearsightedness or myopia, is the cornea enlarged or smaller than normal?!
Question:
During nearsightedness or myopia, is the cornea enlarged or smaller than normal?
I really need information.
Answers:
Hi Joshuayap!
Myopia most often occurs because the eyeball is too long, rather than the normal, more rounded shape. Another less frequent cause of myopia is that the cornea, the eye’s clear outer window, is too curved. In other word, Myopia is the cornea enlarged (eyeball is too long or the cornea has too much curvature).
Our ability to "see" starts when light enters the eye through the cornea. The shape of the cornea, lens and eyeball help bend (refract) light rays in such a manner that light is focused into a point precisely on the retina.
In contrast, if you are nearsighted, the light rays from a distant point are focused at a place in front of the retina. As the light will only be focused in that one place, by the time it reaches the retina it will have "defocused" again, forming a blurred image.
Jason Homan