Amblyopia, also known as lazy eye, is a vision development disorder in which an eye fails to achieve normal visual acuity, even with prescription eyeglasses or contact lenses. It is the most common cause of vision problems in children. Amblyopia i...

Bacterial keratitis is an infection of the cornea, the clear outer layer of the eye, caused by bacteria. Symptoms of bacterial keratitis include redness, pain, light sensitivity, blurred vision, and discharge from the eye. Treatment typically invo...

Batten disease, a rare genetic disorder, belongs to a group of progressive degenerative neurometabolic disorders known as the neuronal ceroid lipofuscinoses. These disorders share certain similar symptoms and are distinguished in part by the age a...

Batten disease, a rare genetic disorder, belongs to a group of progressive degenerative neurometabolic disorders known as the neuronal ceroid lipofuscinoses. These disorders share certain similar symptoms and are distinguished in part by the age a...

Batten disease, a rare genetic disorder, belongs to a group of progressive degenerative neurometabolic disorders known as the neuronal ceroid lipofuscinoses. These disorders share certain similar symptoms and are distinguished in part by the age a...

Black Eye is a mobile photography app that allows users to take and edit photos with a variety of filters, effects, and tools. It also includes features such as face recognition, portrait mode, and a variety of other editing tools....

Carotid artery disease is a condition in which the carotid arteries, which are the two main arteries that supply blood to the head and neck, become narrowed or blocked due to a buildup of plaque. This can lead to a stroke or transient ischemic att...

Central serous chorioretinopathy (CSC) is a disorder of the eye in which fluid accumulates beneath the retina, causing it to detach from the back of the eye. This can lead to blurred vision, distortion of vision, and blind spots. CSC is usually ca...

Choroidal neovascular membranes (CNVM) are abnormal blood vessels that grow from the choroid, a layer of blood vessels that lies beneath the retina. These abnormal vessels can cause vision loss by leaking fluid and blood into the macula, the area ...

Coloboma is a congenital eye defect that occurs when part of the eye does not form properly during development. It is characterized by a gap in one or more parts of the eye, such as the iris, retina, choroid, or optic disc. Coloboma can cause visi...

Corneal abrasion is a condition in which the outer layer of the cornea (the clear, dome-shaped surface that covers the front of the eye) is scratched or scraped. It is a common eye injury that can cause pain, redness, tearing, and light sensitivit...

Crouzon syndrome is a rare genetic disorder that may be evident at birth (congenital) or during infancy. The disorder is characterized by distinctive malformations of the skull and facial (craniofacial) region. Such abnormalities may vary greatly ...

Best vitelliform macular dystrophy is an autosomal dominant genetic form of macular degeneration that usually begins in childhood or adolescence and slowly progresses to affect central vision. The age of onset and severity of vision loss are highl...

Cytomegalovirus retinitis is an infection of the retina caused by the cytomegalovirus (CMV). It is a common cause of vision loss in people with weakened immune systems, such as those with HIV/AIDS. Symptoms of CMV retinitis include blurred vision,...

Diabetic eye disease is a group of eye problems that can occur in people with diabetes. These eye problems can include diabetic retinopathy, cataracts, and glaucoma. Diabetic retinopathy is the most common form of diabetic eye disease and is cause...

Diabetic retinopathy is a complication of diabetes that affects the eyes. It occurs when high blood sugar levels damage the blood vessels in the retina, the light-sensitive tissue at the back of the eye. This can lead to vision loss or blindness. ...

Endophthalmitis is an inflammation of the inner layers of the eye, usually caused by an infection. It can be caused by bacteria, fungi, or viruses, and can lead to vision loss if not treated promptly. Symptoms of endophthalmitis include redness, p...

Eye lymphoma is a type of cancer that affects the eye. It is a rare form of non-Hodgkin lymphoma, which is a type of cancer that affects the lymphatic system. Eye lymphoma can affect the eye itself, the orbit (the area around the eye), or the eyel...

Giant Cell Arteritis (GCA) is a type of vasculitis, or inflammation of the blood vessels. It is a chronic inflammatory disorder that affects the large and medium-sized arteries, most commonly the temporal arteries. Symptoms of GCA include headache...

Glaucoma is a group of eye diseases that damage the optic nerve, which carries information from the eye to the brain. It is usually caused by an abnormally high pressure in the eye, which can damage the optic nerve and lead to vision loss. Glaucom...

Vogt-Koyanagi-Harada disease is a rare disorder of unknown origin that affects many body systems, including as the eyes, ears, skin, and the covering of the brain and spinal cord (the meninges). The most noticeable symptom is a rapid loss of visio...

Histoplasmosis is a fungal infection caused by the fungus Histoplasma capsulatum. It is most commonly found in the soil of areas with high bird or bat droppings, such as caves, old buildings, and chicken coops. Symptoms of histoplasmosis can range...

HIV/AIDS and the Eye is a term used to describe the effects of HIV/AIDS on the eyes. HIV/AIDS can cause a variety of eye problems, including inflammation of the eye, dry eye, and vision loss. HIV/AIDS can also increase the risk of developing certa...

Hyphema is a condition in which there is bleeding in the front chamber of the eye, between the cornea and the iris. It is usually caused by trauma to the eye, such as a blunt force or a sharp object. Symptoms of hyphema include blurred vision, red...

Idiopathic intracranial hypertension (IIH) is a neurological disorder characterized by increased pressure in the fluid surrounding the brain (cerebrospinal fluid). It is also known as pseudotumor cerebri. Symptoms of IIH include headaches, vision ...

Ischemic optic neuropathy (ION) is a condition that affects the optic nerve, which is the nerve that carries visual information from the eye to the brain. It is caused by a decrease in blood flow to the optic nerve, which can be caused by a variet...

Juvenile Macular Dystrophy (JMD) is a rare, inherited eye disorder that affects the macula, the part of the eye responsible for central vision. It is characterized by progressive vision loss, usually beginning in childhood or adolescence. Symptoms...

X-linked juvenile retinoschisis (RS) is a genetic disorder affecting males. Major symptoms include poor eyesight and degeneration of the retina. The retina consists of membrane layers in the eye that receive visual images. It is composed of suppor...

Kenny-Caffey syndrome type 2 (KCS2) is an extremely rare hereditary skeletal disorder characterized by thickening of the long bones, thin marrow cavities in the bones (medullary stenosis), and abnormalities affecting the head and eyes. Most cases ...

Kenny-Caffey syndrome type 2 (KCS2) is an extremely rare hereditary skeletal disorder characterized by thickening of the long bones, thin marrow cavities in the bones (medullary stenosis), and abnormalities affecting the head and eyes. Most cases ...

Low vision is a condition in which a person has difficulty seeing, even with corrective lenses or other visual aids. It is usually caused by eye diseases such as macular degeneration, glaucoma, or diabetic retinopathy. People with low vision may h...

Macular edema is a condition in which fluid accumulates in the macula, the part of the eye responsible for central vision. It can cause blurred vision, difficulty reading, and other vision problems. Macular edema can be caused by a variety of cond...

Macular hole is a small break in the macula, a small spot near the center of the retina that is responsible for sharp, central vision. Macular holes can cause blurred or distorted central vision, and if left untreated, can lead to permanent vision...

Macular pucker is a condition in which the macula, the part of the eye responsible for central vision, becomes wrinkled or distorted. It is caused by the formation of scar tissue on the macula, which can cause blurred or distorted vision. Treatmen...

Macular telangiectasia (also known as MacTel) is a rare eye condition that affects the macula, the part of the eye responsible for central vision. It is characterized by the formation of abnormal blood vessels in the macula, which can lead to visi...

Ocular melanoma is a rare type of cancer that develops in the cells of the eye. It is the most common primary cancer of the eye in adults, and it can occur in both the iris and the choroid (the layer of tissue between the retina and the sclera). S...

Optic neuritis is an inflammation of the optic nerve, which is the nerve that carries visual information from the eye to the brain. Symptoms of optic neuritis include sudden vision loss, pain in the eye, and color vision changes. Optic neuritis is...

Photokeratitis is a painful eye condition caused by exposure to ultraviolet (UV) radiation. It is sometimes referred to as "snow blindness" or "welder's flash." Symptoms of photokeratitis include redness, tearing, pain, and temporary vision loss. ...

Phthisis, also known as pulmonary tuberculosis, is one of the most common illnesses that humans face. It affects people of all ages, from all walks of life, and in every country.  While phthisis may affect almost every organ in...

Pigment Dispersion Syndrome (PDS) is a condition in which pigment granules from the iris of the eye are released into the anterior chamber of the eye. This can cause the iris to become thinner and more transparent, resulting in a change in eye col...

Preeclampsia is a pregnancy complication characterized by high blood pressure and signs of damage to another organ system, most often the liver and kidneys. Preeclampsia usually begins after 20 weeks of pregnancy in women whose blood pressure had ...

A pituitary tumor is a tumor that forms in the pituitary gland near the brain that can cause changes in hormone levels in the body. This illustration shows a smaller tumor (microadenoma). Pituitary tumors are abnormal growths that develop ...

Retinal artery occlusion is a condition in which the blood supply to the retina is blocked. This can be caused by a clot, plaque, or other obstruction in the artery. Symptoms of retinal artery occlusion include sudden vision loss, eye pain, and se...

Retinitis Pigmentosa (RP) is a group of inherited eye diseases that cause progressive vision loss. It is caused by a genetic mutation that affects the light-sensitive cells in the retina, which are responsible for converting light into signals tha...

Retinoblastoma is a rare form of eye cancer that affects the retina, the light-sensitive tissue at the back of the eye. It is most commonly found in children under the age of five, and is caused by a genetic mutation. Symptoms of retinoblastoma in...

Retinopathy of prematurity (ROP) is a potentially blinding eye disorder that affects premature babies. It is caused by abnormal blood vessel growth in the retina, the light-sensitive tissue at the back of the eye. ROP can lead to retinal detachmen...

Stargardt disease is a genetic disorder that causes progressive vision loss in children and young adults. It is the most common form of inherited juvenile macular degeneration. Symptoms typically begin in childhood and include blurred vision, diff...

Stickler Syndrome is a genetic disorder that affects the connective tissues in the body. It is caused by a mutation in one of several genes, and it can cause a variety of symptoms, including hearing loss, vision problems, joint pain, and skeletal ...

Strabismus, commonly known as crossed eyes, is a condition in which the eyes are not properly aligned with each other. It is caused by a lack of coordination between the extraocular muscles, which control the movement of the eyes. Strabismus can c...

Vogt-Koyanagi-Harada disease is a rare disorder of unknown origin that affects many body systems, including as the eyes, ears, skin, and the covering of the brain and spinal cord (the meninges). The most noticeable symptom is a rapid loss of visio...

Vitamin A deficiency is a condition that occurs when a person does not get enough vitamin A in their diet. It can lead to a variety of health problems, including night blindness, dry eyes, and an increased risk of infection. It is most common in d...

Best vitelliform macular dystrophy is an autosomal dominant genetic form of macular degeneration that usually begins in childhood or adolescence and slowly progresses to affect central vision. The age of onset and severity of vision loss are highl...