Vitreous humour is seen in

Which of the following statements is correct regarding the pupil of the human eye?
$(I)$. It is the aperture surrounded by the iris.
$(II)$. The diameter of the pupil is regulated by the muscle fibres of the iris.
$(III)$. It is a transparent crystalline structure attached to the ciliary body.
The correct option is:

In which part of the sclera blood capillaries are absent?

The bipolar nerve cells in the retina transmit impulses to the . . . . . . .

The retina is most sensitive at:

The blind spot in the eye is located at .....