Braille is a system of raised dots that can be read with the fingers by people who are blind or who have low vision. Teachers, parents, and others not visually impaired ordinarily read braille with their eyes. Braille is not a language. Instead, it is a code by which many languages—such as English, Spanish, Arabic, Chinese, and dozens of others—may be written and read.
Computer vision syndrome, also called digital eye strain, describes a group of eye and vision-related problems resulting from prolonged computer, tablet, e-reader, and cell phone use. Many individuals experience eye discomfort and vision problems when viewing digital screens for extended periods.
Age-related macular degeneration is the most common cause of severe loss of eyesight among people aged 50 and older. Only the center of vision is affected by this disease. It is important to realise that people rarely go blind from it.
Eye donation involves donating your corneas—not your iris. It is sometimes called a keratoplasty or a corneal graft. When you register as an organ donor, you can also choose to be a tissue donor. Donating your corneas is called a tissue donation.
A dense, cloudy area in the eye's lens is called a cataract. The retina converts light from the lens into signals. The optic nerve transmits them to the brain. When proteins clump together, the lens cannot send clear images to the retina.
