Genetic eye diseases are conditions affecting vision that are caused by changes in our DNA. DNA is the blueprint for our bodies, and when certain parts of this ...

Gelatinous Drop-Like Corneal Dystrophy (GDLD) is a rare inherited eye disease. In this disorder, the clear front window of the eye (the cornea) develops soft, ...

Gaze-Evoked Amaurosis (GEA) is a rare eye condition in which a person temporarily loses vision in one eye when looking in a particular direction. The vision ...

Gardner syndrome is a rare inherited disorder now recognized as a variant of familial adenomatous polyposis (FAP). In this condition, dozens to thousands of ...

Galactokinase deficiency, also known as Type II galactosemia, is a rare genetic disorder in which the enzyme that normally converts galactose into ...

Fungal keratitis is an infection of the clear front window of the eye (the cornea) caused by a fungus. The cornea helps focus light onto the retina, allowing ...

Fungal endophthalmitis is an infection that affects the inside of the eye. In simple terms, it happens when tiny living organisms called fungi enter the clear ...

Fundus autofluorescence (FAF) is a non-invasive imaging modality that has become increasingly popular in both research and clinical settings due to its ability ...

Functional Visual Loss (FVL), also known as Nonorganic Visual Loss (NOVL), describes a genuine experience of reduced sight without any detectable damage or ...

Fulminant idiopathic intracranial hypertension (FIH) is a rare, rapidly progressive form of idiopathic intracranial hypertension (IIH). In IIH, cerebrospinal ...

Fuchs’ Endothelial Dystrophy is a condition of the cornea, the clear “window” at the front of the eye. In this disorder, the innermost layer of the ...

Fuchs’ Superficial Marginal Keratitis (FSMK) is a rare eye disease that affects the outer edge of the clear front window of the eye (the cornea). In FSMK, the ...

Fuchs heterochromic iridocyclitis (FHI) is a rare, chronic form of anterior uveitis—an inflammation of the front part of the eye—that most often affects only ...

A frontocutaneous fistula is an abnormal tunnel that runs from the frontal sinus (located behind your forehead) through bone and soft tissue to the skin ...

Froin syndrome is a rare neurological sign characterized by the triad of cerebrospinal fluid (CSF) xanthochromia (yellow discoloration), markedly elevated CSF ...

Friedreich ataxia is a rare inherited disease that damages parts of the nervous system and heart. It makes it hard to walk, harms muscle coordination, and can ...

Foville Syndrome is a rare brainstem condition caused by a lesion—usually in the dorsal (back) part of the pons in the brainstem—that damages certain nerve ...

The fovea is a tiny pit in the center of the retina (the back of the eye) that gives us very sharp central vision—what we use to read, recognize faces, and see ...

Foster-Kennedy Syndrome is a rare neurological and eye-related condition where one eye shows optic atrophy (a pale, shrunken optic nerve indicating ...

The Foldable Capsular Vitreous Body (FCVB) is a medical device made to replace the natural gel (the vitreous) inside the back part of the eye when that gel is ...