How Will You Define The Embryology Of Lens And Retina?

Retina is a part of the eye that converts the electromagnetic energy of the light into useful information for the brain. Retina is actually a thin layer of nerve cells at the back of the eyeball. There are two kinds of light sensitive receptor cells found in the retina. The names they have been given describe their shapes:
Rods, which are long and cylindrical
cones, which are short, thick and tapered.

The lense is located directly behind the pupil. The lens acts to bend the rays of light so that they are properly focused on the rear of the eye. The lens focuses light by changing its own thickness, a process called accommodation.
Distant objects require a relatively flat lens. In this case, the muscles controlling the lens relax, allowing the lens to flatten. In contrast, close objects are viewed best through a rounded lens. Here , the muscle contract, relieving tension and permitting the lens to become rounder.

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