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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 ...
Flicker vertigo, sometimes called the Bucha effect, is "an imbalance in brain-cell activity caused by exposure to low-frequency flickering (or flashing) of a relatively bright light." [ 1 ] It is a disorientation -, vertigo -, and nausea -inducing effect of a strobe light flashing at 1 Hz to 20 Hz, approximately the frequency of human brainwaves .
It may be associated with nausea, vomiting, and eye nystagmus. The cause is often not clear. It may be due to a virus , but it can also arise from bacterial infection, head injury , extreme stress , an allergy , or as a reaction to medication . 30% of affected people had a common cold prior to developing the disease. [ 1 ]
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 ...
Dry eye caused by these procedures usually resolves after several months, but it can be permanent. [16] [failed verification] Persons who are thinking about refractive surgery should consider this. [4] An eye injury or other problem with the eyes or eyelids, such as bulging eyes or a drooping eyelid can cause keratoconjunctivitis sicca. [15]
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 ...
Many conditions cause dizziness because multiple parts of the body are required for maintaining balance including the inner ear, eyes, muscles, skeleton, and the nervous system. [7] Thus dizziness can be caused by a variety of problems and may reflect a focal process (such as one affecting balance or coordination ) or a diffuse one (such as a ...
The NHS is here to help. Feelings of anxiety and depression can affect us all. If you need help with your mental health, you can refer yourself, or your GP can refer you.