Retina

Transcript

Lt Col Reynolds
The retina is a layer of light-sensitive tissue that lines the back of the eye. In a normal eye, the retina is where the light rays that are refracted and focused by the cornea and lens meet. Dr. Patel, what else can you tell us about the retina?

Dr. Patel
Well, Dr. Reynolds, the retina has special cells called photoreceptors, which change light rays into electrical impulses. There are two types of photoreceptors: rods and cones. Rods perceive black and white and enable night vision. Cones perceive color and enable detailed, central vision.

The electrical impulses from the rods and cones are transmitted through the optic nerve to the brain. The brain interprets these electrical impulses as images.

The macula is a tiny, specialized area of the retina that provides detailed, central vision. The other, bigger part of the retina provides peripheral vision.