Question

what are myopia and hyermetropia​

Answer 1

Answer:

A vision condition in which nearby objects are blurry.

Hyperopia is a common vision condition in adults.

Answer 2

Dear, students :)

: $\implies$ The Myopia is a defect of vision in which a person clearly sees all the nearby objects, but is unable to see the distant objects comfortably and his eye is known as a myopic eye. A myopic eye has its far point nearer than infinity. It forms the image of a distant object in front of its retina as shown in the figure.

Note - See fig (i)

❍ Myopia is caused by

increase in curvature of the lens

increase in length of the eyeball

Since a concave lens has an ability to diverge incoming rays, it is used to correct this defect of vision.

: $\implies$ The Hypermetropia is a defect of vision in which a person can see distant objects clearly and distinctively, but is not able to see nearby objects comfortably and clearly.A hypermetropic eye has its least distance of distinct vision greater than 25 cm.

Note - See fig in (ii)

❍ Since a convex lens has the ability to converge incoming rays, it can be used to correct this defect of vision, as you already have seen in the animation.

Hope you understand it now!!:))