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Color Vision Deficiency

Color vision deficiency (also called color blindness) is a vision disorder in which a person sees colors differently than other people see them or has difficulty distinguishing shades of some colors. The disorder occurs when malfunctioning receptor cells for color…

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Secondary Tumors

Cancer cells can spread through the bloodstream or the lymphatic system from a tumor in one area of the body to form a tumor in another part of the body, including in the eye. Treatments A secondary tumor is treated…

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Retinoblastoma

Retinoblastoma is a rare, malignant tumor of the retina that occurs in one or both eyes, usually in children between ages 2 and 3. Because retinoblastoma is often inherited, you should seek genetic counseling before having children if you know…

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Optic Neuritis

Optic neuritis is inflammation of the optic nerve, which disrupts the flow of signals from the retina to the brain and impairs vision. The condition usually develops between ages 20 and 40. In rare cases, optic neuritis results from an…

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Choroiditis

Choroiditis is inflammation of the choroid, the layer of blood vessels beneath the retina (the light-sensitive membrane lining the back of the eye) that supplies the eye with oxygen and nutrients. In some cases, the retina and the vitreous fluid…

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Retinal Artery Occlusion

The retina (the light-sensitive membrane lining the back of the eye) receives its blood supply from the central retinal artery, a tiny blood vessel that enters the back of the eye through the optic nerve. Sometimes, usually in middle-aged or…

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Retinal Detachment

Retinal detachment occurs when the retina—the light-sensitive membrane that lines the inside of the back of the eye—lifts away from the choroid, the layer of blood vessels beneath the retina that supplies the eye with oxygen and nutrients. In most…

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Diabetic Retinopathy

Diabetic retinopathy is an eye disorder in which changes in the blood vessels of the retina (the light-sensitive membrane that lines the back of the eye) can lead to vision loss or blindness. The disorder occurs in people who have…

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