Acute vision is found in ................

If the circular ciliary muscles of the eye are unable to contract,the

The ability to distinguish between different colors is possible in:

The point in the eye of mammals from which optic nerves and blood vessels leave the eyeball is known as:

Rhodopsin is a ...... coloured protein.

Which of the following statements are correct regarding the fovea?
$I -$ The central pit of the macula lutea is called the fovea.
$II -$ The fovea is a thinned-out portion of the retina.
$III -$ The fovea contains densely packed rods.
$IV -$ Visual acuity is highest in the fovea region.