| Rod cells | Cone cells |
|---|---|
| $(1)$ These are rod-shaped photoreceptor cells. | $(1)$ These are cone-shaped photoreceptor cells. |
| $(2)$ They contain the photopigment rhodopsin (visual purple). | $(2)$ They contain photopigments known as iodopsins. |
| $(3)$ They are responsible for scotopic vision (vision in dim light). | $(3)$ They are responsible for photopic vision (daylight vision) and colour vision. |
| $(4)$ They are highly sensitive to light but do not provide colour information. | $(4)$ They are less sensitive to light but provide sharp images and colour discrimination. |
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| Column-$I$ (Chamber) | Column-$II$ (Description) |
| $P$. Aqueous chamber | $I$. Filled with transparent gel |
| $Q$. Vitreous chamber | $II$. Space between cornea and lens |
| $III$. Space between lens and retina | |
| $IV$. Filled with thin watery fluid |
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