Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Types of visual impairment.
Central or paracentral scotoma (A), an area of central impairment of the visual field, usually develops in patients with age-related macular degeneration, diabetic retinopathy, or Stargardt disease. While concentric retraction of the visual field (B) occurs in patients with retinitis pigmentosa or glaucoma.
