1-What section of Optical Instruments is the most confusing? What material is the most interesting?

2-Which of the following statements are true concerning the eye?Check all that apply.

Nearsightedness can be corrected with a diverging lens.

Astigmatism refers to a defect in which the surface of the cornea is not spherical. Instead, it is more sharply curved in one plane than another.

Farsightedness can be corrected with a diverging lens.

The hyperopic eye focuses rays from an object at infinity in front of the retina; the myopic eye focuses rays from an object at infinity behind the retina.

The far point of the normal eye is infinity.