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Doctor insights on: Causes Of Hemeralopia

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What causes lack of eye pigment?

What causes lack of eye pigment?

Lack of eye pigment: Lack of eye pigment can be due to: genetics/inheritance; congenital condition called albinism characterized by the complete or partial absence of pigment in the skin, eyes and hair; lack of nerve innervation to iris (congential horner's syndrome); trauma; prior eye surgery. ...Read more

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Causes of episcleritis (redness in part of eye)?

Causes of episcleritis (redness in part of eye)?

Many things.: The disease is often from association with other diseases like wegener's granulomatosis or rheumatoid arthritis. It can also be from disorders of menstruation. For this reason, scleritis can occur in young women. It can also be the first symptom of connective tissue diseases like scleroderma. Episcleritis or inflammation of the episclera, is less serious and rarely becomes scleritis. ...Read more

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What are the causes of cataracts?

What are the causes of cataracts?

Usually age: If you live long enough, you will get cataracts--not everyone is bothered by cataracts or needs surgery to remove them. Cataracts can also be present at birth or may be caused by certain medical conditions, like diabetes. In addition, a cataract may be caused by an injury or as a side effect of other eye surgery. ...Read more

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Causes of loss of peripheral vision?

Causes of loss of peripheral vision?

Retina-optic nerve: Peripheral vision loss may be a retinal detachment, retinitis pigmentosa, rare drug toxicities, immune retinopathy, retinal infection, and glaucomatous optic neuropathy. In the brain migraine, and certain types of stroke can cause a loss of peripheral vision. Transient obscurations of vision may be low blood pressure. An eye examination with dilation should identify the cause. ...Read more

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Causes of microcephaly?

Causes of microcephaly?

Varied: There are literally hundreds of things that can cause this including various syndromes, prenatal infections and lack of oxygen during birth just to name a few of the more common causes. ...Read more

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Causes of bitemporal hemianopia?

Causes of bitemporal hemianopia?

Pituitary disease: Most losses in the bitemporal pattern - partial or complete - originate with tumors of the pituitary gland pressing on the optic nerve chiasm. There are a few rare cases with this pattern from vascular malformations and tumors like meningioma. ...Read more

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What are the causes of blindness in one eye?

What are the causes of blindness in one eye?

Depends: All depend on the cause of your blindness.Some are trasient or temporary.Others are permanent.See an experienced ophthamolosist. ...Read more

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What are the causes of eye floaters?

What are the causes of eye floaters?

Floaters: A posterior vitreous detachment causes floaters. This is a situation where the vitreous(jelly) of the eye detaches (not a retinal detachment), it then "crumples" up leaving dots, spots, strands of blurry vitreous; i.e. The "floater". You should have an exam to ensure the incident did not tear the retina, which could lead to a retinal detachment. Wait one year then consider surgery. ...Read more

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What are the causes of dilation of pupils?

What are the causes of dilation of pupils?

A few things: I assume you mean dilated and not responding to light. This can be caused by a number of drugs including scopolamine, atropine, most hallucinogens and many others. These should cause the pupils to be dilated equally (unless directly applied to one eye). If your pupils are not equal, then we start to get worried about problems like a head injury and you should seek immediate medical attention. ...Read more

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Causes of hydronephrosis?

Causes of hydronephrosis?

Several: Blockage in the ureter, bladder neck or urethra. This can be internal, external or within the walls of these organs.There are several causes. ...Read more

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What causes errors of refractions?

What causes errors of refractions?

Imperfect eyes: An error in refraction is imbalance between the amount of light-bending (refraction) an eye needs and what it has. A perfectly refracted eye bends the light the exact amount to focus on the retina. Most eyes are not perfect and need to lessen (in nearsightedness) or increase (in farsightedness) the amount of bending. This is done with glasses, contacts or surgery. ...Read more

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What are possible causes of involuntary eye widening?

What are possible causes of involuntary eye widening?

Pupils bigger: Your pupils can become bigger from certain drugs such as atropine, opiates (narcotics), from fear and intense emotion. Also when you are in dim light. ...Read more

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What are the causes of eye tremors?

What are the causes of eye tremors?

Nystagmus: Nystagmus is an involuntary eye movement which usually results in some degree of visual loss. The degree and direction of eye movement, amount of visual loss and resulting impairment varies greatly from person to person. You should check with your doctor, if your eyeball twitches. ...Read more

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What are the causes of nearsightedness?

What are the causes of nearsightedness?

Nearsghtedness: T?His by abnlarge has a familial component. In later years it can develop as a cataract type change. ...Read more

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What are the causes of astigmatism?

What are the causes of astigmatism?

Refractive Error: Here is a great article by mayo clinic: http://www.Mayoclinic.Com/health/astigmatism/ds00230/dsection=causes. Astigmatism has to do with distortions of the curves in the cornea or the lens of the eye. ...Read more

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What are causes of infrequent or lack of eye blinking?

What are causes of infrequent or lack of eye blinking?

Uncommon: The blink rate goes down with concentrated attention such as computer work. No blinking at all is pathologic and will cause corneal opacitification due to dryness. That could be due to lid trauma with scarring or neurologic damage (rare). Blinking is automatic and not really under conscious control for more than a few moments. ...Read more

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What are the causes of retinal cysts?

What are the causes of retinal cysts?

Depends : Peripheral cysts your are born with. Patients can develop cystic changes in the periphery called retinoschisis. Cysts in the central retina? The macula are usually from leakage of blood vessels from diabetes, vein occlusions, inflammation in the eye (uveitis) and rarely macular pucker, retinitis pigmentosa, and Niacin usage. ...Read more

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