Question

If the cornea is to be reshaped (this can be done surgically or with contact lenses) to correct myopia, should its curvature be made greater or smaller? Explain.

a. The curvature should be made greater.
b. The curvature should be made smaller.
c. The curvature should remain unchanged.
d. The curvature should alternate between greater and smaller.

Answer 1

The curvature of the cornea should be made smaller to correct myopia. Hyperopia can be corrected by making the curvature greater.

Step-by-step explanation:

The curvature of the cornea should be made smaller to correct myopia. Myopia, also known as nearsightedness, is a condition where distant objects appear blurry while close objects are clear. It occurs when the eyeball is too long or the cornea is too steep, causing light to be focused in front of the retina instead of directly on it.

To correct myopia, the cornea needs to be flattened to reduce its power and allow light to focus properly on the retina. This can be done surgically through procedures like LASIK or by using contact lenses with a flatter curvature. By reshaping the cornea to have a smaller curvature, light entering the eye can be correctly focused on the retina, improving distance vision.

Hyperopia, on the other hand, is a condition where distant objects are clear but close objects appear blurry. It occurs when the eyeball is too short or the cornea is too flat, causing light to be focused behind the retina. To correct hyperopia, the curvature of the cornea needs to be made greater to increase its power and bring the focus point forward, allowing for better near vision.