Retina of human eye has 2 types of cells called cone cells and rod cells. Cone cells are photoreceptor cells in the retina. The function of these cells is in bright light. Rod cells function in less bright light. There are 4.5 million cone cells and 90 million rod cells in human retina. There are three types of cone cells. First type of cone cells called L which respond to light of long wavelength with peak sensitivity in the yellow region. Second type of cone cells are called M which respond to light of medium wavelength with peak sensitivity in the green region. Third type of cone cells called S which respond to light of short wavelength with peak sensitivity in the violet region.
So, cone cells are not related with eye vision but are related with the perception of color. That is why if a person born without corn cell will be able to see but he will have another problem called color blindness.
So, cone cells are not related with eye vision but are related with the perception of color. That is why if a person born without corn cell will be able to see but he will have another problem called color blindness.