Question

What is a spectrum? What kinds of lens is used to correct myopia?
pls answee​

Answer 1

Explanation:

In Myopia, the image of a nearby object is formed ahead of the retina.

By placing a concave (negative powered) lens in front of a myopic eye, the image is moved farther to the lens and is focussed correctly on the retina.

Answer 2

Answer:

Lenses used to correct nearsightedness are concave in shape. In other words, they are thinnest at the center and thicker at the edge. These lenses are called "minus power lenses" (or "minus lenses") because they reduce the focusing power of the eye.

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Explanation: