Photophobia


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photophobia

[‚fōd·ə′fō·bē·ə]
(psychology)
An abnormal fear of light.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Photophobia

 

an increased visual sensitivity to daylight or artificial light. Photophobia may develop as a result of the inflammation of the anterior chamber of the eye (conjunctivitis, keratitis, and iridocyclitis), the entry of foreign bodies into the cornea, and the irritation of the unprotected eye during electric arc welding (electrophthalmia). Photophobia may also develop with albinism or with the artificial dilatation of the pupils after they fail to contract upon exposure to light, subjecting the retina to light rays. The condition is manifested by eyelid spasms, tearing, and eye pain.

Photophobia is treated by eliminating the main cause and by wearing dark glasses.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
References in periodicals archive ?
(1,2,6) The neurological complications occur in less than 40% of the patients and include altered mental state, meningism, convulsions, neuralgias, confusion, photophobia, and psychosis.
Clinical re-evaluation uncovered that both families had decreased visual acuity, photophobia and total colour blindness along with nystagmus.
A total of four symptoms (Itching, Discharge, Photophobia and Watering) and four signs (Conjunctival hyperemia, papillary hypertrophy, Horner Trantas spots and punctate keratitis) were analyzed.
Phonophobia was reported in 41.9% of patients, and photophobia was reported in 34.4%.
While the patient had undergone multiple surgeries to repair the condition, his monocular diplopia had been ongoing for over 40 years, as well as concurrent complaints of photophobia and blur in the right eye with correction in spectacles.
And it should be remembered that there are other causes of photophobia. Accurate diagnosis before treatment is essential.
As only the patients in Group B could see objects as soon as they finished operation, photophobia was only assessed in Group B, and two patients out of the 27 complained of it (Table 5).
gondii in rats, acanthocephalan worms (also known as spiny-headed worms) override the natural photophobia of their freshwater crustacean hosts.
All patients reported redness, photophobia, swelling of eyelids, watering of eyes, and blurred vision.
Ichthyosis follicularis with alopecia and photophobia. Arch Dermatol.
Incidence of bullous keratopathy is 1-2% in various parts of world.1-3 Patient usually present with decreased vision initially but later on there is intense discomfort, pain, watering, irritation, photophobia due to rupture of bullae and exposure of corneal nerves.
She buffaloes (n=23) aged between three months and eight years with complaints of ocular discomfort and photophobia were diagnosed with Keratoconjunctivitis.