The aperture that regulates the entry of light into the eye is called the ....

The density of the vitreous humour is approximately equal to that of the:

How many eye muscles are present which control all types of eye movement?

Suppose a person wears convex glasses for proper vision. Where do you think the image of the object is formed in his eyes when he is not using the glasses?

Which structure is covered by the iris?

Following are various structures/regions of the human eye. Choose the correct option with respect to the sequence of the passage of light for the formation of an image:
$(A)$ Cornea
$(B)$ Lens
$(C)$ Aqueous humor
$(D)$ Pigment epithelium of retina
$(E)$ Conjunctiva