At the posterior pole of the eye lateral to the blind spot, there is a yellowish pigmented spot called

Select the correct statement.

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

Analogy type question:
$(1)$ Photoreceptor cells : Cones : Dim light vision : ........
$(2)$ Eyeball contains transparent crystalline : Lens : : In front of the lens : .........

Ishihara chart is used to detect:

When different cones of the human eye are stimulated equally,a sensation of ...... light is produced.