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Photophobia is a medical symptom of abnormal intolerance to visual perception of light. [1] As a medical symptom, photophobia is not a morbid fear or phobia, but an experience of discomfort or pain to the eyes due to light exposure or by presence of actual physical sensitivity of the eyes, [2] though the term is sometimes additionally applied to abnormal or irrational fear of light, such as ...
Light sensitivity or photosensitivity refers to a notable or increased reactivity to light. Apart from vision , human beings have many physiological and psychological responses to light. In rare individuals an atypical response may result in serious discomfort, disease, or injury.
Retinal hemorrhage (UK English: retinal haemorrhage) is a disorder of the eye in which bleeding occurs in the retina, the light sensitive tissue located on the back wall of the eye. [1] There are photoreceptor cells in the retina called rods and cones , which transduce light energy into nerve signals that can be processed by the brain to form ...
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The condition primarily affects the retina, the light-sensitive layer at the back of the eye, and sometimes the optic nerve, which transmits visual signals to the brain. Following cataract surgery, the replacement of the natural lens with a synthetic one increases sensitivity to blue light, resulting in a blue-tinged visual field. Similarly ...
Sensitivity of the skin to a light source can take various forms. People with particular skin types are more sensitive to sunburn . Particular medications make the skin more sensitive to sunlight; these include most of the tetracycline antibiotics , heart drugs amiodarone , and sulfonamides .
uncontrollable squinting/closing of eyes; light sensitivity (photophobia) squinting/eyes closing during speech; uncontrollable eyes closing shut (rare instances completely causing blindness) In addition, in some patients, the dystonic spasms may sometimes be provoked by certain activities, such as talking, chewing, or biting.
The retina lines the inside of the eye. It is light-sensitive and communicates visual messages to the brain. If the retina detaches, it moves and shifts from its normal position. This can cause photopsia, but can also cause permanent vision loss. Medical attention is needed to prevent vision loss.