The yellow spot on the retina is known for:

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

Label the following parts in the given diagram of the human eye:
$(a)$ Aqueous chamber
$(b)$ Cornea
$(c)$ Lens
$(d)$ Retina
$(e)$ Vitreous chamber
$(f)$ Blind spot.

When the eye looks at near objects,the lens becomes more convex due to the

What is the approximate number of cones in each human eye?

Which of the following is not correct for rods?
$(I)$. Twilight vision is the function of the rods
$(II)$. It is responsible for daylight vision sometimes
$(III)$. The rods contain a protein called rhodopsin
$(IV)$. Rods are photoreceptor cells
Choose the correct option