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Diplopia. Diplopia. Other names. Double vision. One way a person might experience double vision. Specialty. Neurology, ophthalmology. Diplopia is the simultaneous perception of two images of a single object that may be displaced horizontally or vertically in relation to each other. [ 1] Also called double vision, it is a loss of visual focus ...
Binocular rivalry. Binocular rivalry is a phenomenon of visual perception in which perception alternates between different images presented to each eye. [ 1] An image demonstrating binocular rivalry. If you view the image with red-cyan 3D glasses, the text will alternate between Red and Blue. 3D red cyan glasses are recommended to view this ...
Extraocular muscle. The Parks–Bielschowsky three-step test, [1] also known as Park's three-step test or Bielschowsky head tilt test, [2] is a method used to isolate the paretic extraocular muscle, particularly superior oblique muscle and trochlear nerve (fourth cranial nerve), [3] in acquired vertical double vision. [4]
The mechanism can be explained by some combination of probability summation, neural summation, and effects due to binocular-monocular differences in pupil size, accommodation, fixation, and rivalry. Probability summation comes from the principle that there is a greater chance of detecting a visual stimulus with two eyes than with one eye.
Cover test. A cover test or cover-uncover test is an objective determination of the presence and amount of ocular deviation. It is typically performed by orthoptists, ophthalmologists and optometrists during eye examinations . The two primary types of cover tests are: the alternating cover test. the unilateral cover test (or the cover-uncover ...
Polyphēmos, Epic Greek: [polypʰɛːmos]; Latin: Polyphēmus [pɔlʏˈpʰeːmʊs]) is the one-eyed giant son of Poseidon and Thoosa in Greek mythology, one of the Cyclopes described in Homer 's Odyssey. His name means "abounding in songs and legends", "many-voiced" or "very famous". [ 1] Polyphemus first appeared as a savage man-eating giant ...
Cerebral polyopia. Cerebral diplopia or polyopia describes seeing two or more images arranged in ordered rows, columns, or diagonals after fixation on a stimulus. [ 1][ 2] The polyopic images occur monocular bilaterally (one eye open on both sides) and binocularly (both eyes open), differentiating it from ocular diplopia or polyopia.
English. " Wynken, Blynken, and Nod " is a poem for children written by American writer and poet Eugene Field and published on March 9, 1889. The original title was "Dutch Lullaby". The poem is a fantasy bed-time story about three children sailing and fishing among the stars from a boat which is a wooden shoe. The names suggest a sleepy child's ...