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  2. Upside down goggles - Wikipedia

    en.wikipedia.org/wiki/Upside_down_goggles

    Upside down goggles can be used to demonstrate human adaptation to inverted vision, and as a method of preventing motion sickness. [2] Hubert Dolezal recommended using upside down goggles for "nausea adaptation" for space travel. [3] They can also be used to train spatial abilities and possibly cognitive functions. [Patents of devices 1]

  3. American Optical Company - Wikipedia

    en.wikipedia.org/wiki/American_Optical_Company

    It provided gun sights, aviation goggles, and sunglasses to troops during World War II. [4] After a visit by John F. Kennedy in 1958 to its original manufacturing site in Southbridge, Massachusetts, AO became a go-to brand of the president. [5] Starting in the 1980s, Warner-Lambert divested from American Optical.

  4. Corrective lens - Wikipedia

    en.wikipedia.org/wiki/Corrective_lens

    The add segment of the lens for near vision is the D-shaped area. A bifocal is a lens with two sections, separated by a line (see image to the right). Generally, the upper part of the lens is used for distance vision, while the lower segment is used for near vision. The area of the lens that caters to near vision is called the add segment.

  5. Visionworks - Wikipedia

    en.wikipedia.org/wiki/Visionworks

    Visionworks of America, Inc. (formerly known as Doctors' Value Vision) is an American company which operates or manages 711 optical retail stores in 40 U.S. states and the District of Columbia. [ 1 ] [ 2 ] [ 3 ] The company was incorporated in 1988.

  6. Westland, Michigan - Wikipedia

    en.wikipedia.org/wiki/Westland,_Michigan

    ZIP code(s) 48185, 48186, 48187. Area code: 734: FIPS code: ... There are numerous Nature trails near Westland, Newburg lake is the nearest one to Westland.

  7. Frenzel goggles - Wikipedia

    en.wikipedia.org/wiki/Frenzel_goggles

    Frenzel goggles are a diagnostic tool used in ophthalmology, otolaryngology and audiovestibular medicine for the medical evaluation of involuntary eye movement . They are named after Frenzel, a German physician.

  8. Visual acuity - Wikipedia

    en.wikipedia.org/wiki/Visual_acuity

    6/6 vision is defined as the ability to resolve two points of light separated by a visual angle of one minute of arc, corresponding to 60 PPD, or about 290–350 pixels per inch for a display on a device held 250 to 300 mm from the eye. [24] Thus, visual acuity, or resolving power (in daylight, central vision), is the property of cones. [25]

  9. Pseudomyopia - Wikipedia

    en.wikipedia.org/wiki/Pseudomyopia

    Blurring of distance vision: Intermittent blurring of distant vision after prolonged near work is the main symptom of pseudomyopia. Asthenopia; Headache; Eyestrain; Photophobia [1] Esotropia: Acute onset esotropia may occur in accommodative spasm, which is the common cause of pseudomyopia. [2] Diplopia: Diplopia may occur due to esotropia or ...

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