Impaired vision and blindness are common. About 3.4 million people in the US are blind or visually impaired. Vision is usually measured by visual acuity charts, and normal vision is expressed as 20/20 ...
Wet age-related macular degeneration (AMD) happens when abnormal blood vessels leak fluid into the macula. It can cause wavy lines, blurriness, and dark spots, but not peripheral vision loss. The ...