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An otoscope or auriscope is a medical device used by healthcare professionals to examine the ear canal and eardrum. [ 1 ] [ 2 ] [ 3 ] This may be done as part of routine physical examinations , or for evaluating specific ear complaints, such as earaches, sense of fullness in the ear, or hearing loss .
Stereoacuity is defined as the minimum angle detectable, calculated as the difference between the angles subtended by both positions, A and B. Stereoacuity is possible due to binocular disparity, i.e., the difference in their binocular parallax.
HEINE Optotechnik is a manufacturer of medical diagnostic instruments and is based in Gilching, near Munich, Germany.The company was founded in 1946 by the German physicist Helmut A. Heine and has been a family run company ever since.
Ophthalmoscopy, also called funduscopy, is a test that allows a health professional to see inside the fundus of the eye and other structures using an ophthalmoscope (or funduscope).
Welch Allyn was founded in 1915 in Auburn, New York by Dr. Francis Welch and inventor William Noah Allyn. The two formed a partnership and developed the first hand-held, direct-illuminating ophthalmoscope and convinced Allyn, a medical instruments salesman, to form a partnership. [3]
Comparison of parallax-barrier and lenticular autostereoscopic displays. Note: The figure is not to scale. Autostereoscopy is any method of displaying stereoscopic images (adding binocular perception of 3D depth) without the use of special headgear, glasses, something that affects vision, or anything for eyes on the part of the viewer.