Question

what are causes of myopia and hypermetropia​

Answer 1

Answer:

causes of myopia

1)longening of eyeball

2) curving of cornea

causes of hypermetropia

1)shortening of eyeball

2)excessive curvature of eye lens.......

Answer 2

Answer:

causes of myopia :

Myopia occurs when the eyeball is too long, relative to the focusing power of the cornea and lens of the eye. This causes light rays to focus at a point in front of the retina, rather than directly on its surface.

Nearsightedness can also be caused by the cornea and/or lens being too curved for the length of the eyeball. In some cases, myopia occurs due to a combination of these factors.

Causes of hypermetropia:

Your eyes focus light rays and send the image of what you’re looking at to your brain. When you’re farsighted, the light rays don’t focus like they should. The cornea, the clear outer layer of your eye, and the lens focus images directly on the surface of your retina, which lines the back of the eye. If your eye is too short, or the power to focus is too weak, the image will go to the wrong place, behind the retina. That’s what makes things look blurry.

Hyperopia often runs in families. But lots of children who get it from their parents outgrow it