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  2. Computer vision syndrome - Wikipedia

    en.wikipedia.org/wiki/Computer_vision_syndrome

    A Pacific University research study of 36 participants found significant differences in irritation or burning of the eyes, tearing, or watery eyes, dry eyes, and tired eyes, that were each improved by amber colored lenses versus placebo lenses, [11] but in a follow-up study in 2008, the same team was not able to reproduce the results of the ...

  3. Xerophthalmia - Wikipedia

    en.wikipedia.org/wiki/Xerophthalmia

    Xerophthalmia (from Ancient Greek xērós (ξηρός) meaning "dry" and ophthalmos (οφθαλμός) meaning "eye") is a medical condition in which the eye fails to produce tears. It may be caused by vitamin A deficiency, [1] which is sometimes used to describe that condition, although there may be other causes.

  4. Vertigo - Wikipedia

    en.wikipedia.org/wiki/Vertigo

    Vertigo that is caused by problems with the inner ear or vestibular system, which is composed of the semicircular canals, the vestibule (utricle and saccule), and the vestibular nerve is called "peripheral", "otologic", or "vestibular" vertigo. [15] [16] The most common cause is benign paroxysmal positional vertigo , which accounts for 32% of ...

  5. Dizziness vs. vertigo: What the difference is and why it matters

    www.aol.com/lifestyle/dizziness-vs-vertigo...

    There are two types of vertigo — peripheral and central — and each has a different cause. Peripheral vertigo is caused by a problem in the part of the inner ear that controls balance. (This is ...

  6. Dry eye syndrome - Wikipedia

    en.wikipedia.org/wiki/Dry_eye_syndrome

    Most cases are caused by a genetic predisposition, but chronic conjunctivitis, canine distemper, and drugs such as sulfasalazine and trimethoprim-sulfonamide also cause the disease. [68] Symptoms include eye redness, a yellow or greenish discharge, corneal ulceration, pigmented cornea, and blood vessels on the

  7. Caloric reflex test - Wikipedia

    en.wikipedia.org/wiki/Caloric_reflex_test

    Hot and cold water produce currents in opposite directions and therefore a horizontal nystagmus in opposite directions. [4] In patients with an intact brainstem: If the water is warm (44 °C or above) endolymph in the ipsilateral horizontal canal rises, causing an increased rate of firing in the vestibular afferent nerve.