Papilledema – definition, causes and symptoms

Papilledema definition Papilledema – swelling of the optic disk, the point at which the OPTIC NERVE enters the RETINA, that results from increased pressure within the skull. Papilledema typically signals serious neurologic damage such as STROKE or TRAUMATIC BRAIN INJURY (TBI) that causes bleeding (HEMORRHAGE), brain tumor, extreme HYPERTENSION, or inflammatory INFECTION such as ENCEPHALITIS and MENINGITIS. Though papilledema is […]

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Uveitis – symptoms and treatment

What is Uveitis and Definition INFLAMMATION of the uveal structures of the EYE, which include the iris, ciliary body, and choroid. Uveitis most commonly affects the front of the eye (anterior uveitis) though may involve specific segments of the eye or the uveal tract throughout the eye. Symptoms of Uveitis Symptoms can vary from mild to severe and […]

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Color Deficiency – vision impairment

What is Color Deficiency and definition Color Deficiency a VISION IMPAIRMENT in which the ability to distinguish certain, and rarely all, colors is impaired. Color deficiency represents a shortage of normal cones, the specialized cells on the RETINA that detect color. Cones contain photosensitive chemicals that react to red, green, or blue. The most common presentation of color deficiency, accounting for […]

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Hordeolum – Stye – causes, symptoms and treatment

Hordeolum definition Hordeolum is a bacterial INFECTION of a gland or an eyelash follicle along the edge of the eyelid, commonly known as a stye. A hordeolum causes swelling, redness, PAIN, and a discharge that leaves a crusty layer on the eyelids during sleep. The doctor can usually diagnose hordeolum by its presentation. BLEPHARITIS (infection of the inside surface of […]

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Papillitis – optic neuritis – symptoms and treatment

Papillitis definition Papillitis – optic neuritis – INFLAMMATION of the optic disk, the portion of the OPTIC NERVE that enters the RETINA (also called the “blind spot”). Papillitis typically results from, and may be an early diagnostic indicator of, systemic inflammatory conditions such as MULTIPLE SCLEROSIS and temporal arteritis. The inflammation also may follow viral or bacterial INFECTION such as SINUSITIS, […]

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Vision Impairment – symptoms and treatment

Vision Impairment Definition Vision Impairment – the uncorrectable loss of vision. About 12 million Americans have vision impairments that prevent them from participating in occupations and activities that have requirements or legal standards for VISUAL ACUITY (the ability to see clearly) and VISUAL FIELD (the scope of peripheral vision). People who have functional vision, also called low vision, generally have […]

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Conjunctivitis – inflammation of the conjunctiva

What is Conjunctivitis and definition Conjunctivitis – an INFLAMMATION of the conjunctiva, or mucous tissue that lines the inside of the eyelids. There are many causes for conjunctivitis, commonly called pink EYE, including INFECTION (bacterial, viral, or fungal) and contact contamination such as due to pollen or substances in the air or on the fingers that irritate the tissues. Infectious conjunctivitis is highly contagious […]

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Hyperopia – farsightedness – definition and treatment

What is Hyperopia and definition Hyperopia is a refractive error, commonly called farsightedness, in which the EYE has difficulty focusing on near objects. Hyperopia results when the focal point of lightwaves entering the eye extends past the RETINA, causing the images the retina registers to be blurred. The refractive error occurs because the distance from the front to the […]

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Photophobia – what is, definition and symptoms

What is Photophobia and definition Photophobia- heightened sensitivity to bright light, usually the result of INFLAMMATION or irritation to structures of the EYE or with MYDRIASIS (extended dilation of the pupil). Photophobia causes discomfort in the eye ranging from a burning sensation to outright PAIN. Often there is excessive tearing and the eye becomes reddened in response to the […]

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Xanthelasma – definition and removal

Xanthelasma Definition Xanthelasma – deposits of fatty plaque that form blisterlike lesions on the eyelids, usually the upper eyelids near the corner of the NOSE. The lesions are yellowish in color and often indicate HYPERLIPIDEMIA (elevated BLOOD levels of cholesterol and triglycerides). Though harmless, the lesions can cause the eyelid to droop, obscuring vision when an upper lid […]

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