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Retina in Medical Dictionary

Artery

... brainstem, cerebellum and occipital lobes. retina l artery occlusion Definition retina l artery occlusion refers to the closure of the central retina l artery and usually results in complete loss ...

Bends

... bends light and helps to focus it onto the retina where specialized cells (photo receptors) detect ... the lens bends and focuses the rays on the retina . The lens changes shape to allow the eye to ... eye . This causes the light rays to focus on the retina . Any clouding of the lens will interfere with ...

Blindness

... optic nerve , by disease of the cornea or retina , by pathological changes originating in ... of certain color-sensitive cells in the retina . The retina is the nerve layer at the back of the eye ...

Choroid

... between the sclera (white of the eye ) and retina . It is part of the uvea and supplies nutrients ... of the layer of the eye behind the retina , either in its entirely ( multi focal choroid ... eye , which is between the outer layer and the retina . Choroid plexus papilloma (WHO grade I) ...

CMV retinitis

... causes infection and inflammation of your retina ( CMV retinitis ). If not treated, CMV ... In AIDS patients, it can result from retina l disease such as CMV retinitis . The ... vitreous humor to increase the pressure on the retina . ...

Detached retina

... Detached retina l repair is asurgical procedure that repairs a detached retina (a separation of the retina from its normal position lining the back of the ...

Diabetic retinopathy

... is progressive damage to the eye 's retina caused by long-term diabetes . It can cause ... diabetes affecting the blood vessels in the retina (the thin light-sensitive membrane that covers ... can damage the blood vessels that feed the retina , putting people with the disease at high risk ...

Epithelium

... the whole layer. Once the two layers of the retina , the sensory retina and the retina l pigment epithelium (RPE), lose contact with ...

Eye

... to the cornea , iris , pupil , lens , retina , macula , optic nerve , choroid and ... electrical response of the rods and cones in the retina . It is useful in the evaluation of hereditary and acquired disorders of the retina . Attitude may be readily ascertained as in ...

Exudate

... there may be hemorrhage s ( bleeding ) in the retina with leakage of blood causing a "wet retina " or protein deposits ( exudate s) in the retina . As a consequence, the ...

Fluorescein

... and analyze the blood circulation in the retina and choroid . Angiography , fluorescein : A test to examine blood vessels in the retina , choroid , and iris of the eye . A special ... Fluorescein angiography is used to diagnose retina l problems and circulatory disorders. It is ...

Fluorescein angiography

... and analyze the blood circulation in the retina and choroid . Fluorescein angiography is used to diagnose retina l problems and circulatory disorders. It is ... to assess the extent and type of changes in the retina and its blood vessels. Careful examination ...

Iris

... that controls the amount of light sent to the retina . Lens (the crystalline lens ) ... Iris ... eye . This causes the light rays to focus on the retina . ANIRIDIA - A congenital absence of the ... the iris and pupil that focuses light on the retina of the eye . leprosy ... Abnormal ...

Lens

... eye . This causes the light rays to focus on the retina . Lens Disease s Ocular Hypertension - ... the iris and pupil that focuses light on the retina of the eye . leprosy ... Lens cleaning ... in the eye that focuses light onto the retina . Laser cyclophotocoagulation ... The lens ...

Macula

... the macula , the central portion of the retina , impairing central vision . Macula r ... area, the macula , lies at the back of the retina and is the part that produces the sharpest ... affects the macula (the central part of the retina of the eye ) causing decreased visual acuity ...

Macular Degeneration

... Macular degeneration is a disease of the retina that affects the macula in the back of the ... the macula , the central portion of the retina , impairing central vision . Macular ... area, the macula , lies at the back of the retina and is the part that produces the sharpest ...

Myopia

... a distant object becomes focused in front of the retina , ... Myopia may develop as a result of many ... and lens of the eye help focus light on the retina so that the eye can see. Update Date: 7/4/2001 ... eyes are brought into focus in front of the retina . [ Med Help International ] [ Search ] [ Ask the ...

Papilledema

... ... Abnormal findings may include a detached retina , swelling of the optic nerve ( papilledema ... damage caused by glaucoma , or changes in the retina that may indicate macular degeneration (such ... ( papilledema ) or tiny hemorrhage s into the retina of the eye , which are evident on careful eye ...

Prematurity

... Retinopathy of prematurity Definition: The retina is the part of the eye that transmits visual ... Retinopathy of prematurity is a disorder of retina l blood vessel development in the premature ... are born prematurely or at a low birth weight. retina l blood vessels develop at the back of the eye ...

Pupil

... your eye care professional to see more of your retina , the light-sensitive layer of tissue at the ... the eye that focuses light rays onto the retina . 17) pupil - the opening in the middle of ... eye . This causes the light rays to focus on the retina . The crystalline lens (commonly referred to ...

Refraction

... bend light so that an image is focused onto the retina . For Your Information Books ... Stable ... determination Ultrasound of the eye retina l photography Fluorescein angiography ... It ... in which the image is focused behind the retina of the eye rather than upon it, either because ...

Retinal detachment

... Retinal detachment repair Definition: Detached retina l repair is asurgical procedure that repairs a detached retina (a separation of the retina from its normal position lining the back of the ...

Retina

... retina l detachment may be caused by trauma , advanced ... fills the vitreous cavity of your eye . retina l vasculitis : The retina is the portion of the eye that contains the ...

Retinopathy

... Retinopathy of prematurity Definition: The retina is the part of the eye that transmits visual ... Retinopathy of prematurity is a disorder of retina l blood vessel development in the premature ... light-sensitive lining of the back of the eye ( retina ). The damage is known as retinopathy . ...

Retinitis

... Recently I've seen some articles about a retina l computer chip that supposedly allows previously ... pigmentosa is a progressive degeneration of the retina (part of the eye ) which affects night vision ... given to a group of hereditary disease s of the retina - the light sensitive tissue in the back of ...

Retinitis pigmentosa

... Recently I've seen some articles about a retina l computer chip that supposedly allows previously ... pigmentosa is a progressive degeneration of the retina (part of the eye ) which affects night vision ... given to a group of hereditary disease s of the retina - the light sensitive tissue in the back of ...

Retinoblastoma

... ( cancer ) cells form in the tissue s of the retina . Retinoblastoma is sometimes caused by a gene ... age 5, that arises in cells in the developing retina containing cancer -predisposing mutation s in ... is a rare cancer ous tumor of the retina . It generally affects children younger than 6 ...

Sclera

... in the sclera (the tough layer beneath the retina , also known as the white of the eye ). These ... vascular layer between the sclera and the retina that supplies blood to the retina and conducts arteries and nerve s to other ...

Transplantation

... well as from mental health professionals. retina l cell transplantation is another RP ... researched. It involves transplanting healthy retina l cells into the disease d retina . Testing in humans has begun, and the early ...

Uveitis

... . This is called choroid itis. If the adjacent retina is also involved it is called chorio retinitis . ... uvea provides most of the blood supply to the retina . Uveitis is most common in people ages 20 ... , and the choroid . The uvea lies between the retina and sclera . Resources: ... pantoscopic ...

Amaurosis fugax

... vision in one eye caused by a temporary lack of blood flow to the retina . Amaurosis fugax is thought to result from a clot of plaque in the carotid artery breaking off and travelling to the retina l artery in the eye . ...

Color Blindness

... from an absence or malfunction of certain color-sensitive cells in the retina . The retina is the nerve layer at the back of the eye that converts light into ...

Cytomegalovirus

... by cryptosporidium or isospora. RETINITIS : Inflammation of the retina , linked in AIDS to cytomegalovirus infection . Untreated, it can ... blindness . RETINOPATHY : Noninflammatory degenerative disease of the retina . Cucchiara BL, Forman MS, McGarvey ML, et al.: Fatal sub acute ...

Eye Problems

... the syndrome . About half of cases have pigmentary degeneration of the retina . Glistening white dots on the retina are characteristic. People with Sjogren-Larsson syndrome tend to be ...

Glaucoma

... inside the eye . The increased pressure causes compress ion of the retina and the optic nerve which can eventually lead to nerve damage. ... ey family history of retinal detachment tiny or weak spots in the retina that are seen by an eye doctor ... If extensive retinal detachment ...

Laser surgery

... laser beam through a special contact lens to make burns around the retina l tear. The burns cause scarring, which usually "welds" the retina to the underlying tissue . Laser Surgery : The (Costly) Magic of ...

Scar

... untreated, the CNV can turn into scar tissue and replace the normal retina l tissue in the macula (the central part of the retina that provides sharp central vision . Fibrosis is the formation of ...

Uvea

... iris , the ciliary body , and the choroid . The uvea lies between the retina and sclera . Resources: Books ... Uveitis is often classified by ... the uvea . The uvea provides most of the blood supply to the retina . Causes of uveitis can include autoimmune disorders , infection , or ...

Vasculitis

... an allergic reaction to a drug or other foreign agent. Symptoms ... retina l vasculitis : The retina is the portion of the eye that contains the nerve s of sensation that ...

Vitamin A

... A deficiency . The rod cells, one of two light-sensitive areas of the retina of the eye , are impaired in their capacity to produce a chemical ... light intensity. Abnormal results can indicate arteriosclerosis of the retina , retinal detachment , temporal arteritis (with eye involvement), or ...
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