Fibrous Dysplasia
Fibrous dysplasia is a rare, non-inherited bone condition in which normal bone and its marrow are gradually replaced by abnormal, weak, fibrous (scar-like) tissue. Instead of forming the strong, ...
Rx Eye & Vision Care (A – Z)
Fetal Alcohol Spectrum Disorders
Fetal Alcohol Spectrum Disorders (FASD) is the name for a range of problems that happen when a baby is exposed to alcohol before birth. Alcohol crosses the placenta and affects the developing baby’s ...
Festoons
Festoons are soft, sagging, bag-like swellings that appear on the lower eyelid and upper cheek area, typically forming a “hammock” or bulge over the cheek (distinct from ordinary under-eye bags or ...
Familial Retinal Arterial Macroaneurysms (FRAM)
Familial Retinal Arterial Macroaneurysms (FRAM), also called Retinal Arterial Macroaneurysm with Supravalvular Pulmonic Stenosis (RAMSVPS), is a rare inherited vascular disorder that mainly affects ...
Familial Exudative Vitreoretinopathy
Familial Exudative Vitreoretinopathy, or FEVR, is a rare inherited eye disease that affects how blood vessels grow in the retina, which is the light-sensitive layer at the back of the eye. In a ...
Facial Nerve Palsy
Facial nerve palsy means that the seventh cranial nerve (the facial nerve) is not working properly. This nerve controls the muscles of the face—so when it is damaged or inflamed, one side (or rarely ...
Fabry Disease
Fabry disease is a rare inherited disorder caused by a problem in a single gene called GLA. That gene gives instructions to make an enzyme named alpha-galactosidase A. This enzyme normally breaks ...
Eyelid Laceration
An eyelid laceration is a cut or tear in the skin and underlying structures of the eyelid. Eyelids protect the eye, help spread tears to keep the eye moist, and keep foreign material out. When the ...
Eyelid Burns
An eyelid burn is damage to the skin and tissues of the eyelid caused by heat (thermal), chemicals, radiation, or electricity. Because the eyelid is thin and very close to the eye itself, burns here ...
Eyelash Ptosis
Eyelash ptosis means that the upper eyelashes bend downward or droop instead of having their normal slight upward curve. Normally, upper eyelashes sweep upward away from the eye, helping protect it ...
Eye Tattooing
Eye tattooing refers to putting pigment (ink) into parts of the eye to change its appearance. There are two very different contexts: one is therapeutic or reconstructive—called corneal tattooing or ...
Eye Injury Diseases
Eye injury diseases means any damage to the eye or the tissue around it caused by accidents, hits, chemicals, heat, radiation, sharp objects, or other force. These injuries can hurt vision for a ...
Eye Banking
Eye banking is a system of collecting, checking, preserving, and giving donated eye tissue—especially corneas—to surgeons who transplant it into people who have lost vision because their cornea is ...
Ocular Adnexa Manifestations of Warthin Tumor
Warthin tumor (also called papillary cystadenoma lymphomatosum or adenolymphoma) is a benign tumor that usually grows in the parotid salivary gland near the ear. It has two main parts seen under a ...
Exudative (Serous) Retinal Detachment
Exudative retinal detachment, also called serous retinal detachment, is when fluid builds up under the retina without any tear or traction pulling it away. The retina is the light-sensitive layer at ...
Extraocular Muscle Lymphoma
Extraocular Muscle Lymphoma is a rare type of cancer where lymphoma cells grow inside or around the muscles that move the eye (the extraocular muscles). These muscles are responsible for up, down, ...
Exposure Keratopathy
Exposure keratopathy is damage to the clear front surface of the eye (the cornea) that happens when the eye is not fully protected or wetted by the eyelids and tears. When the eyelids do not close ...
Exotropia
Exotropia is a type of strabismus (eye misalignment) where one or both eyes turn outward, away from the nose. Sometimes it happens all the time, and sometimes only part of the time. When the eyes are ...
Exenteration
Exenteration is a very large, radical surgery done to remove all the organs and tissues from a body cavity when disease—most often cancer—is deeply stuck, has come back, or cannot be controlled by ...
Myopic Laser Vision Correction
Myopic Laser Vision Correction means using laser surgery to fix myopia, also called nearsightedness. Myopia is when your eye can see things that are close clearly, but things far away look blurry. ...
