What is retinine?

Answer 1

Retina is a part of eye.All the light rays reflect at retina and thus we can see.It has two pars

1)Fovea

2)Optical disc

Fovea

It is dip in eye directly opposite to lens.

Optis disc

It is point on retina where optic nerves enter retina.There are no rods and cones so it is called BLIND SPOT

Answer 2

It seems there was a spelling error in the term you provided. If you meant "retinol," it is a form of vitamin A that is essential for good vision, skin health, and cell growth. Retinol is a common ingredient in skincare products due to its ability to promote collagen production and improve skin texture.