Assertion : Astigmatism is due to uneven curvature of lens.
Reason : It is treated with cylindrical lenses.

Assertion (A) : Astigmatism is due to uneven curvature of lens. Reason (R ) : It is treated with cylindrical lenses.

Assertion (A) : Astigmatism is due to uneven curvature of lens. Reason (R ) : It is treated with cylindrical lenses.

Assertion : Myopia is due to the increase in the converging power of eye lens. Reason : Myopia can be correct with the help of concave lens.

Assertion : A thick lens shows more chromatic aberration. Reason : Thick lens behave as many thin lenses.

The defect of vision which occurs due to excessive curvature of the eye lens is

Assertion : The focal length of an equiconvex lens placed in air is equal to radius of curvature of either face. Reason : For an equiconvex lens radius of curvature of both the faces is same.