Neovascular glaucoma happens when the retina does not get enough oxygen for a period of time (this is called retinal ischemia). In response, the eye releases a ...
Neonatal conjunctivitis means inflammation and discharge of the eye surface in a newborn baby during the first 28 days of life. The thin, clear skin that ...
Necrotizing herpetic retinitis is a serious eye infection that damages the retina. The retina is the thin, light-sensing layer at the back of the eye that lets ...
Erythropoietin (EPO) is a glycoprotein hormone produced by the peritubular cells of the renal cortex. This hormone stimulates red blood cell production in ...
Early destruction of red blood cells (RBCs), also known as hemolysis, leads to hemolytic anemia, a condition where RBCs are destroyed faster than the ...
Necrotizing fasciitis is a very fast, very serious infection under the skin. It attacks the “fascia,” which is the thin but strong sheet that covers muscles, ...
Necrobiotic xanthogranuloma (NXG) is a very rare disease of the immune system that most often shows up in the skin, especially around the eyes. In this ...
The nasolacrimal duct is a tiny tube that carries tears from the eye into the nose. The duct starts at small openings on the eyelid edges called puncta. The ...
A naso-orbitoethmoid (NOE) complex fracture is a break of the thin bones in the middle of the face where the top of the nose meets the inner corner of the eye ...
Nanophthalmos is a rare eye condition where the eyeball is smaller than normal in all parts, but the basic parts of the eye are still built in the usual way. ...
Dermatochalasis means “too much skin” on the eyelids—most often the upper lids—so the skin drapes or “hoods” over the natural eyelid crease. It happens mainly ...
Blepharoptosis, often shortened to ptosis, means the upper eyelid hangs lower than normal. In plain terms: the top eyelid droops and may cover part of the ...
Müller’s Muscle–Conjunctival Resection—often shortened to MMCR—is a small, inside-the-eyelid operation used to lift a mildly droopy upper eyelid (ptosis). The ...
Möbius syndrome (Moebius syndrome) is a rare condition present at birth. It mainly affects the 6th (abducens) and 7th (facial) cranial nerves. Because these ...
Myopic traction maculopathy (MTM) is a problem that happens in some people with high (pathologic) myopia. The very back of the eye (the macula, which you use ...
Myopic choroidal neovascular membrane (myopic CNVM) is a condition where abnormal blood vessels grow beneath the retina in individuals with high myopia, also ...
Myopia of prematurity is nearsightedness that starts very early in babies born too soon. In myopia, distant objects look blurry because the eye focuses light ...
Myopia (also called nearsightedness) means distant objects look blurry while near objects look clear. In very simple terms, the eye’s built-in focusing system ...
Myogenic ptosis means the upper eyelid droops because the levator palpebrae superioris muscle (the main “lid-lifting” muscle) is weak, stiff, or poorly formed. ...
Myelinated retinal nerve fiber layer means the insulating “white coating” (myelin) that normally stops at the back of the eye has grown a little farther ...
