Which of the following is a characteristic of the human cornea?

Hypermetropia (farsightedness) is a vision defect where a person can see distant objects clearly but has difficulty focusing on nearby objects. It can be corrected by using:

In humans,corneal transplants are rarely rejected. This is because:

The cavity of the vitreous humour in the eyes is situated:

Good vision depends on adequate intake of carotene-rich food. Select the best option from the following statements:
$(1)$ Vitamin $A$ derivatives are formed from carotene.
$(2)$ The photopigments are embedded in the membrane discs of the inner segment.
$(3)$ Retinal is a derivative of vitamin $A$.
$(4)$ Retinal is a light-absorbing part of all the visual photopigments.

The vitreous humor is a jelly-like substance found in the posterior part of the ........