The inner layer of the pericardium.
An internal organ of the body, specifically one within the chest (as the heart or lungs) or abdomen (as the liver, pancreas or intestines). “Viscus” is the Latin word for “an organ of the body.” The plural of “viscus” is “viscera.”
- Vision therapy
The use of special eye exercises to address eye defects, such as strabismus. Some vision therapists claim that eye exercises can help people with neurological or learning disabilities. Vision therapy is not proven for the latter use, although some patients do report improvement.
- Vision, central
A process in which millions of cells change light into nerve signals that tell the brain what the person is seeing. As a person reads, drives, and performs other activities that require fine, sharp, straight-ahead vision, light is focused onto the macula in the center of the retina, the light-sensitive layer of tissue at the […]
- Vision, low
Visual loss that cannot be corrected with eyeglasses or contact lenses and that interferes with daily living activities.
- Vision, macular
The macula is a special area in the center of the retina, the light-sensitive layer of tissue at the back of the eye. As we read, light is focused onto our macula. There, millions of cells change the light into nerve signals that tell the brain what we are seeing. This is called our macular […]