Human eyeball consist of three layers which are- 1) Sclera, 2) Choroid and 3) Retina.
Retina consist of three sub-layers which are - ganglion cells, bipolar cells and photo-receptor cells.
Photo-receptor cells are of two types which are Rods and Cones.
Difference between Rods and Cones.
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Rods |
Cones |
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1) they are sensitive to deem light. |
1) they are sensitive to bright light. |
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2) they show black and white vision. |
2) they show coloured vision. |
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3) they show Scotopic vision. |
3) they show Photopic vision. |
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4) they contain protein rhodopsin. |
4) they contain protein iodopsin. |
