Galactosemia. Deficiency in the enzyme called Galactose-1-phosphate iridyl transferase . This enzyme is important for galactose metabolism which is simple sugar that can be found in Milk. High level of Galactose in the blood can lead to systemic and ocular manifestation such as Cataract.
Ganglion Cells of Retina. Cells that are located in the inner layer of retina. Axons of Ganglion cells will form the optic nerve.
Giant Papillary Conjunctivitis. Allergic conjunctivitis which is characteristic by large bumps or cysts in the inner side of the eyelid especially the upper eyelid.
Goldenhar Syndrome. Congenital disease that has systemic and ocular manifestations. Ocular manifestations are dermoid, coloboma of the upper eyelid and disc and microphthalmia.
Gonioscopy. Examination of the angle of the eye special lens. This examination helps to differentiate between open and close angle glaucoma.
Goniotomy. Type of Glaucoma surgery that is done mainly for congenital glaucoma. An opening in the trabecular meshwork and Schlemm Canal is created to help drainage of aqueous humor and decrease intraocular pressure.
Gradenigo Syndrome. Infection of the mastoid and petrous bones. This infection spreads from otitis media. Damage to Sixth cranial nerve can occur because it passes near these bones.
Graft Rejection, cornea Graft recipient's immune system attacks the graft as a foreign body and destroy it.
Granular Corneal Dystrophy. Type of corneal dystrophy which occurs mainly in the stromal layer of the cornea. It is characteristic by scattered corneal opacity with clear areas in between.
Granulomatous Uveitis. Intraocular inflammation that is associated with larger cells than non-granulomatous uveitis. Granulomatous uveitis can be associated with nodules formation in the iris.
Grave Disease. Auto-immune disease that affect thyroid gland which cause over secretion of thyroid hormones.