AAID (Alacrima, Achalasia, and Intellectual Disability Syndrome) is a rare, inherited condition. The three core problems are: Alacrima: very low or ...

Alacrima means the eyes do not make enough tears or, in some people, almost no tears at all. Tears are not only “water.” Healthy tears are a balanced mix of ...

Adult-onset vitelliform macular dystrophy (AOVMD) is a slow, usually mild, retinal condition that appears in adults, most often between ages 30 and 60. It ...

Adult-onset foveomacular vitelliform dystrophy is a rare, usually slow-moving eye condition that starts in adulthood (often in your 40s–60s). It affects the ...

Acute Zonal Occult Outer Retinopathy, or AZOOR, is a rare eye condition. It starts suddenly. People notice bright flashes of light (called photopsia) and ...

Achromatopsia 2 (ACHM2) is a genetic eye condition that starts from birth. It mainly affects the cone cells in the retina, which are the light-sensing cells ...

Pingelapese blindness is a rare, inherited eye condition. People with it see the world in shades of gray. They cannot see color. Bright light hurts their eyes ...

Incomplete color blindness means a person’s eyes and brain do not read color in the usual way. Colors may look faded, mixed up, or too similar. Most people ...

“Eye zone of injury” describes how far back into the eye wall an injury has gone. Doctors divide the globe (the eyeball itself) into zones to quickly describe ...

Zinc optic neuropathy means damage to the optic nerve—the cable that carries visual signals from the eye to the brain—caused primarily by a lack of zinc in the ...

Eye Zika Virus means eye problems caused by infection with the Zika virus. Zika is a virus spread mainly by Aedes mosquitoes. It can also spread through sex, ...

Xerophthalmia is the medical name for eye disease caused by vitamin A deficiency. “Xero” means dry, and “ophthalmia” means a problem in the eyes. When the body ...

“Xen glaucoma” is not a separate disease. It usually means glaucoma that is being treated (or planned to be treated) with a XEN Gel Stent, or glaucoma that ...

Xanthelasma (often called xanthelasma palpebrarum) is a harmless, yellow, soft patch that grows on the eyelids, most often near the inner corner and along the ...

X-linked retinoschisis (XLRS) is a genetic eye condition that mostly affects boys and men. It causes the retina—the light-sensing “film” lining the back of the ...

The condition recognized in the medical literature is X-linked endothelial corneal dystrophy (XECD). Despite the word “anterior” in your prompt, XECD primarily ...

A Wolfring gland ductal cyst is a fluid-filled sac that forms in the tiny tear-making tubes (ducts) of the accessory lacrimal glands of Wolfring. These ...

Wolfram syndrome (often called WFS or DIDMOAD) is a rare, genetic, multi-system disorder that usually begins in childhood or the teen years. The nickname ...

Wipe-out, also called snuff-out, is a sudden, severe, and usually irreversible loss of the remaining central vision that can happen soon after glaucoma surgery ...

Kayser–Fleischer ring is a golden-brown to greenish ring seen at the edge of the cornea (the clear front window of the eye). It forms when excess copper in the ...