McArdle Disease
McArdle Disease (also called Glycogen Storage Disease Type V) is a rare inherited condition that affects how muscle cells use stored sugar (called glycogen) for energy. People with McArdle Disease ...
Rx Eye & Vision Care (A – Z)
Glycogen Storage Disease
Glycogen is your body’s “quick-use” sugar storage. Think of it like a rechargeable battery made of many glucose units. Your liver stores glycogen to keep blood sugar steady between meals. Your ...
Posner–Schlossman Syndrome (PSS)
Posner–Schlossman Syndrome (PSS), also known as glaucomatocyclitic crisis, is a rare eye condition marked by sudden, temporary spikes in pressure inside one eye (intraocular pressure, or IOP) ...
Glaucomatocyclitic Crisis
Glaucomatocyclitic crisis, also called Posner–Schlossman syndrome (PSS), is a rare eye condition marked by sudden, short-lived rises in pressure inside one eye (intraocular pressure) alongside mild ...
Glaucoma with Infectious Disease
Glaucoma is a group of eye conditions that damage the optic nerve, which carries visual signals from your eye to your brain. When this nerve is harmed, vision loss can follow. Pressure inside the ...
Glaucoma with Immunogenetic Disorders
Glaucoma refers to a group of eye conditions in which damage to the optic nerve leads to vision loss, often associated with high pressure inside the eye (intraocular pressure, IOP). Immunogenetic ...
Giant Retinal Tears
Giant retinal tears (GRTs) are serious eye injuries that can lead to rapid vision loss if not recognized and treated promptly. In very simple English, a giant retinal tear is a large break in the ...
Giant Fornix Syndrome (GFS)
Giant Fornix Syndrome (GFS) is a rare, long-lasting eye disease. In GFS, pus keeps coming from the eye because bacteria hide in a very deep fold (fornix) under the eyelid. This happens mostly in ...
Ghost Cell Glaucoma
Ghost cell glaucoma is a rare form of secondary open-angle glaucoma that happens when the fluid drainage system of the eye becomes blocked by small, rigid, degenerated red blood cells known as “ghost ...
Gerstmann Syndrome
Gerstmann syndrome is a rare neurological condition first described in 1924 by Austrian neurologist Josef Gerstmann. It arises when a small region of the dominant (usually left) parietal ...
Geographic Atrophy
Geographic atrophy (GA) is the advanced, late stage of the dry form of age-related macular degeneration (AMD). In GA, patches of light-sensing cells in the central part of the retina—the ...
Genetic Eye Disease
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 blueprint carry errors or mutations, ...
Gelatinous Drop-Like Corneal Dystrophy
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, jelly-like bumps under its outer layer. ...
Gaze-Evoked Amaurosis
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 returns to normal as soon as the eye moves ...
Gardner Syndrome
Gardner syndrome is a rare inherited disorder now recognized as a variant of familial adenomatous polyposis (FAP). In this condition, dozens to thousands of small growths called adenomatous polyps ...
Galactokinase Deficiency
Galactokinase deficiency, also known as Type II galactosemia, is a rare genetic disorder in which the enzyme that normally converts galactose into galactose-1-phosphate (galactokinase, or GALK1) is ...
Fungal Keratitis
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 us to see clearly. When fungi invade the ...
Fungal Endophthalmitis
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 fluids or soft tissues deep inside the ...
Fundus Autofluorescence (FAF)
Fundus autofluorescence (FAF) is a non-invasive imaging modality that has become increasingly popular in both research and clinical settings due to its ability to map naturally and pathologically ...
Functional Visual Loss (FVL)
Functional Visual Loss (FVL), also known as Nonorganic Visual Loss (NOVL), describes a genuine experience of reduced sight without any detectable damage or disease in the eyes or visual pathways. In ...
