What is the function ofretina in the human eye? And function of iris in human eye?

Question

The Retina is located at the back of the eye and this part of the eye contains multiple layers of sensory tissue. The retina has millions of photosensitive cells known as photoreceptors which work to capture and convert light rays into electric signals. These signals then travel to the brain through the optic nerve where they are converted into the images we see. The iris of the eye is the colored ring just behind the clear, outer glaze of the eye's cornea. Behind the iris is the crystalline lens. In the center of the iris is the pupil, the black hole that changes size. The iris is made of connective tissue, smooth muscle fibers, and pigments that give the iris its color.The pigments in the iris are made of melanin (the same pigment that gives skin its color) and lipochrome. The amount of pigment in the eye creates eye color

Ramneek Gupta · Accepted Answer

The Retina is located at the back of the eye and this part of the eye contains multiple layers of sensory tissue. The retina has millions of photosensitive cells known as photoreceptors which work to capture and convert light rays into electric signals. These signals then travel to the brain through the optic nerve where they are converted into the images we see. The iris of the eye is the colored ring just behind the clear, outer glaze of the eye's cornea. Behind the iris is the crystalline lens. In the center of the iris is the pupil, the black hole that changes size. The iris is made of connective tissue, smooth muscle fibers, and pigments that give the iris its color.The pigments in the iris are made of melanin (the same pigment that gives skin its color) and lipochrome. The amount of pigment in the eye creates eye color