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2. History of optics - Wikipedia

   en.wikipedia.org/wiki/History_of_optics

   Isaac Newton (1643–1727) investigated the refraction of light, demonstrating that a prism could decompose white light into a spectrum of colours, and that a lens and a second prism could recompose the multicoloured spectrum into white light. He also showed that the coloured light does not change its properties by separating out a coloured ...

3. Chicken eyeglasses - Wikipedia

   en.wikipedia.org/wiki/Chicken_eyeglasses

   Elmer Haas of the National Band & Tag Company, a major producer of rose-colored chicken eyeglasses, whose grandfather had devised wireframes for chickens in 1902, [13] indicated that he believed the purported blood-masking effect of the rose coloring was a myth: "the firm added the rose-colored glasses because it indulged the chicken owners ...

4. Bauernfeind prism - Wikipedia

   en.wikipedia.org/wiki/Bauernfeind_prism

   The Bauernfeind prism is commonly used in microscope tubes and in geodesy to deviate the path to the eyepiece in order make the device more ergonomic. More recent applications are glasses that deflect the viewing angle either downwards (for relaxed reading or watching TV), or upwards (as in belay glasses for watching a climber while belaying).

5. Prism adaptation - Wikipedia

   en.wikipedia.org/wiki/Prism_Adaptation

   Prism adaptation can be used to rehabilitate the visuo-spatial deficits of neurological disorders such as unilateral neglect.It has become clear that with respect to being used as a long-term rehabilitative tool, prism adaptation is only effective when it is repeated over many sessions and with sufficiently strong prism goggles (Newport and Schenk, 2012).

6. Congenital fourth nerve palsy - Wikipedia

   en.wikipedia.org/wiki/Congenital_fourth_nerve_palsy

   The cause of congenital fourth nerve palsy is unclear in most cases. It may be neurogenic in origin, due to a dysgenesis of the CN IV nucleus or nerve, but a clinically similar palsy may result from absence or mechanical dysfunction (e.g., abnormal laxity) of the superior oblique tendon.

7. Uppendahl prism - Wikipedia

   en.wikipedia.org/wiki/Uppendahl_prism

   An Uppendahl prism is an erecting prism, i.e. a special reflection prism that is used to invert an image (rotation by 180°). The erecting system consists of three partial prisms made of optical glass with a high refractive index cemented together to form a symmetric assembly and is used in microscopy as well as in binoculars technology.