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Virtual reality sickness. Virtual reality sickness ( VR sickness) occurs when exposure to a virtual environment causes symptoms that are similar to motion sickness symptoms. [ 1] The most common symptoms are general discomfort, eye strain, headache, stomach awareness, nausea, vomiting, pallor, sweating, fatigue, drowsiness, disorientation, and ...
Rapid eye movement behavior disorder occurs when there is a loss of normal voluntary muscle atonia during REM sleep resulting in motor behavior in response to dream content. It can be caused by adverse reactions to certain drugs or during drug withdrawal; however, it is most often associated with the elderly and in those with neurodegenerative ...
Driver drowsiness detection is a car safety technology which helps prevent accidents caused by the driver getting drowsy. Various studies have suggested that around 20% of all road accidents are fatigue-related, up to 50% on certain roads. [ 1][ 2]
Ray tracing (graphics) Appearance. hide. Not to be confused with Ray tracing (physics). This recursive ray tracing of reflective colored spheres on a white surface demonstrates the effects of shallow depth of field, "area" light sources, and diffuse interreflection. ( c.2008) In 3D computer graphics, ray tracing is a technique for modeling ...
Specialty. Psychiatry. Rhythmic movement disorder ( RMD) is a neurological disorder characterized by repetitive movements of large muscle groups immediately before and during sleep often involving the head and neck. It was independently described first in 1905 by Zappert as jactatio capitis nocturna and by Cruchet as rhythmie du sommeil. [ 1]
Here are her tried-and-true tips after 25 years as a professional traveler: Avoid caffeine: Brown recommends turning down the in-flight coffee service so that the caffeine doesn't keep you up ...
Orthokeratology lens. Orthokeratology, also referred to as Night lenses, Ortho-K, OK, Overnight Vision Correction, Corneal Refractive Therapy (CRT), Accelerated Orthokeretology, Cornea Corrective Contacts, Eccentricity Zero Molding, and Gentle Vision Shaping System (GVSS), is the use of gas-permeable contact lenses that temporarily reshape the cornea to reduce refractive errors such as myopia ...
On TikTok, users tout the benefits of wearing compression socks while flying and urge others to wear them on long-haul flights, too. Compression socks can help reduce swelling and the risk of ...