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of or pertaining to the (eye) Greek ὀφθαλμός (ophthalmós), the eye ophthalmology: opistho-back, behind, rear [8] Greek ὄπῐσθεν (ópisthen), behind, at the back opisthotonus-opsy: examination or inspection Greek ὄψῐς (ópsis), view biopsy, autopsy: optic(o)-of or relating to chemical properties of the eye
Rheum from a cat's eyes. Rheum ( / ruːm /; from Greek: ῥεῦμα rheuma 'a flowing, rheum') is a thin mucus naturally discharged from the eyes, nose, or mouth, often during sleep (contrast with mucopurulent discharge ). [ 1][ 2][ 3] Rheum dries and gathers as a crust in the corners of the eyes or the mouth, on the eyelids, or under the nose ...
The night hag or old hag is the name given to a supernatural creature, commonly associated with the phenomenon of sleep paralysis. It is a phenomenon in which the sleeper feels the presence of a supernatural, malevolent being which immobilizes the person as if sitting on their chest or the foot of their bed. The word "night-mare" or "nightmare ...
The English suffixes -phobia, -phobic, -phobe (from Greek φόβος phobos, "fear") occur in technical usage in psychiatry to construct words that describe irrational, abnormal, unwarranted, persistent, or disabling fear as a mental disorder (e.g. agoraphobia), in chemistry to describe chemical aversions (e.g. hydrophobic), in biology to describe organisms that dislike certain conditions (e.g ...
Neurology. Irregular sleep–wake rhythm disorder ( ISWRD) is a rare form of circadian rhythm sleep disorder. [ 2][ 3] It is characterized by numerous naps throughout the 24-hour period, no main nighttime sleep episode, and irregularity from day to day. [ 4] Affected individuals have no pattern of when they are awake or asleep, may have poor ...
Palep herself was quite concerned with the dosage of the light therapy provided by the masks, as not every patient may require the same amount and duration of the treatment. "The potential dangers ...
None; harmless [ 3] Sleep paralysis is a state, during waking up or falling asleep, in which a person is conscious but in a complete state of full-body paralysis. [ 1][ 2] During an episode, the person may hallucinate (hear, feel, or see things that are not there), which often results in fear. [ 1][ 3] Episodes generally last no more than a few ...
Hypnic jerk. A hypnic jerk, hypnagogic jerk, sleep start, sleep twitch, myoclonic jerk, or night start is a brief and sudden involuntary contraction of the muscles of the body which occurs when a person is beginning to fall asleep, often causing the person to jump and awaken suddenly for a moment. Hypnic jerks are one form of involuntary muscle ...