Retina

The image projected onto the retina is inverted.

In the retina of the eye, a cone has a much smaller receptive field than a rod, giving us sharper colour vision in bright conditions.

The choroid is a highly vascularised, darkly pigmented layer found in between the retina and the sclera of the eye.

The choroid is darkly pigmented to fully absorb the light passing through the retina, so as to avoid internal reflection which would lead to blurry vision.

The security system scanned Tom's retina.

Have you ever had a detached retina?

This could cause irreversible damage to Damiano’s retina.

Research has shown that UV radiation increases the likelihood of certain cataracts. Although curable with modern eye surgery, cataracts diminish the eyesight of millions of Americans and cost billions of dollars in medical care each year. Other kinds of eye damage include pterygium (tissue growth that can block vision), skin cancer around the eyes, and degeneration of the macula (the part of the retina where visual perception is most acute). All of these problems can be lessened with proper eye protection. Look for sunglasses, glasses or contact lenses if you wear them, that offer 99 to 100 percent UV protection.