Low Vision

What does 20/20 vision mean?

A term used to express normal visual acuity, meaning you can see clearly at 20 feet what should normally be seen at that distance.

What is low vision?

Vision loss that can't be corrected with glasses, contacts, medications, or surgery, typically defined as a visual acuity of 20/70 or poorer in the better-seeing eye.

What are the common causes of low vision disorders?

Age-related macular degeneration (AMD), glaucoma, cataracts, and diabetic retinopathy.

What characterizes age-related macular degeneration (AMD)?

Gradual loss of sharp central vision, poor contrast sensitivity, and sensitivity to glare.

What are the two types of macular degeneration?

Dry (atrophic) and Wet (neovascular/exudative) macular degeneration.

What is glaucoma and its primary cause?

A group of diagnoses causing damage to the optic nerve head, primarily caused by an increase in intraocular pressure (IOP).

What is the leading cause of blindness in people aged 18-64 in the US?

Diabetic retinopathy.

What are common symptoms of diabetic retinopathy?

Patchy blurred vision, floaters, color vision loss, and sudden vision loss.

What are cataracts?

A condition where the lens becomes clouded with an opaque substance, decreasing light to the retina.

What is a common treatment for cataracts?

Surgery to remove the clouded lens and replace it with an artificial clear lens.

What are the impact and consequences of visual impairment?

Visual impairment can lead to a higher likelihood of falls, motor vehicle collisions, depression, and anxiety disorders.

What are the implications of low vision on daily activities?

Low vision can significantly impact ADLs, IADLs, education, work, play and leisure, and social participation.