The pupil is the tiny dark hole in the center of the iris that dilates or constricts in response to the amount of light available and emotional states such as fear. The iris’s two muscles control the pupil’s size. Disorders that...
Eyes normally adjust well to changes in light by dilation or constriction of the pupil, which allows light to enter the eye. In some diseases, however, errors in development allow extra light to enter the eye or keep the eye from adapting to light...
Congenital cataracts are a clouding of the natural lens of the eye that is present at birth or that develops shortly after birth. In most congenital cataracts, no specific cause for the cataract is found; however, congenital cataracts that occur...
Wilms Tumor is a rare form of childhood cancer. About 500 children develop Wilms tumor each year, most before the age of 5. In spite of its rare occurrence, researchers have identified genetic changes that increase a child's risk of developing...
Glaucoma is a disease that causes loss of peripheral vision due to damage to the retina and optic nerve. Severe glaucoma results in what is called "tunnel vision" because the remaining visual field is like looking through a tunnel. Different types...
Glaucoma causes loss of peripheral vision due to damage to the retina and optic nerve. Risk factors include being over 60 years of age, having a family history of glaucoma and being of African American decent. The most common type of glaucoma,...
