Vision loss refers to either complete or partial loss of vision. Depending on the cause, vision loss may occur suddenly or gradually and in one or both eyes. Some types of vision loss are temporary or ...

Trifocal lenses correct three types of vision: close-up, intermediate, and distance. You may be more familiar with correction for distances far away and near, but you likely use your intermediate ...

Vision loss can result from a number of different conditions, including refractive errors and cataracts. There are 2.2 billion people around the world who live with near or distance vision impairment, ...

In the United States alone, about 45 million people wear contact lenses to correct their vision. While not as popular as traditional glasses, contact lenses have distinct advantages for eye health and ...

Visual distortions can cause blurry or wavy vision and have different causes. Some visual distortions are emergencies, especially with sudden vision changes or severe symptoms. Age-related macular ...

Acuity of vision is a term used to describe the clearness or sharpness of your vision when measured at a distance of 20 feet. ‌ Visual acuity is the most common clinical measurement of how your eyes ...

Blindness has many types and causes, ranging from injuries and infections to neurological or congenital conditions. People can categorize blindness based on its cause or whether a person has complete ...