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Hormone replacement therapy for women going through menopause has been found to be associated with dry eyes, [13] which in turn is associated with blepharospasm. Blepharospasm can be caused by concussions in some rare cases, when a blow to the back of the head damages the basal ganglia. [36] Blepharospasm is associated with exposure to the sun ...
Non-physiological causes of mydriasis include disease, trauma, or the use of certain types of drug. It may also be of unknown cause. Normally, as part of the pupillary light reflex, the pupil dilates in the dark and constricts in the light to respectively improve vividity at night and to protect the retina from
Dilation and constriction of the pupil. Pupillary response is a physiological response that varies the size of the pupil, via the optic and oculomotor cranial nerve.. A constriction response (), [1] is the narrowing of the pupil, which may be caused by scleral buckles or drugs such as opiates/opioids or anti-hypertension medications.
Pupillary hippus, also known as pupillary athetosis, is spasmodic, rhythmic, but regular dilating and contracting pupillary movements between the sphincter and dilator muscles. [ 1 ] [ 2 ] Pupillary hippus comes from the Greek hippos meaning horse, perhaps due to the rhythm of the contractions representing a galloping horse. [ 3 ]
Most causes of lightheadedness are not serious and either cure themselves quickly or are easily treated. Keeping a sense of balance requires the brain to process a variety of information received from the eyes , the nervous system , and the inner ears .
According to the National Sleep Foundation, nearly 45% of people report feeling more tired during the winter, and a large part of that is due to the shorter days and longer nights. But it's not ...
"The potential dangers of using at-home LED masks include headaches, eye strain, sleep disturbances, insomnia and mild visual side effects," she explained.
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 ...