Powerful optical devices useful to persons with vision impairments that are not successfully corrected by the usual prescription lenses.
Glossary of Eye and Vision Terms
Common terms to help you learn more about your eyes and vision
Macula
The region of the retina that helps provide best central vision. The fovea is at the center of the macula.
Matricular degeneration
This is a common misspelling of macular degeneration. Find out more about age-related macular degeneration
Myopia
Myopia (my-OH-pea-uh), or nearsightedness, is a vision condition in which distant objects appear blurred – such as roadway signs, the board at school, faces, or the television set across the
Near Vision
The ability to perceive objects distinctly at normal reading distance (usually about 14 inches from the eye).
Nearsightedness
Myopia (my-OH-pea-uh), or nearsightedness, is a vision condition in which distant objects appear blurred – such as roadway signs, the board at school, faces, or the television set across the
Night Blindness
Condition in which sight is good by day but deficient at night and in any faint light.
Optic Disk
Head of optic nerve; formed by the meeting of all retinal nerve fibers in the retina.
Optic Nerve
Special nerve of sight beginning in the retina as the optic disk, which carries messages from the retina to the brain, resulting in visual images.
Partial Solar Eclipses
Partial solar eclipses occur when the moon passes in front of the sun, but only blocks part of the sun. Viewing a partial solar eclipse can expose your eye to