a) To correct myopia, is it necessary to move the image formed by the eye closer

Question

a) To correct myopia, is it necessary to move the image formed by the eye closer to or farther from the eye’s lens system? Does this require a convergent or divergent lens? Does this corrective lens add to or subtract from the light-bending power of the eye’s lens system? Is the curvature of this lens concave or convex?

b)On the eye model, the positions for the retina screen are labeled NORMAL, FAR, and NEAR. Why is the position labeled NEAR farthest from the lens? What does the word NEAR refer to?

(suppose you are using Pasco Human Eye pdf)

Explanation / Answer

Myopia is the term used to define short sightedness. Light from a distant object forms an image before it reaches the retina. This could be because the eye is too long, or the cornea or crystalline lens is too strong.

A myopic person has clear vision when looking at objects close to them, but distant objects will appear blurred.

Myopia is easily corrected by using diverging lens or concave lens (minus powered) placed in front of a myopic eye, moving the image back to the retina and clarifying the image.

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