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2. Maddox rod - Wikipedia

   en.wikipedia.org/wiki/Maddox_rod

   The strength of the prism is increased until the streak of the light passes through the centre of the prism, as the strength of the prism indicates the amount of deviation present. The Maddox rod is a handheld instrument composed of red parallel plano convex cylinder lens , which refracts light rays so that a point source of light is seen as a ...

3. Sixth nerve palsy - Wikipedia

   en.wikipedia.org/wiki/Sixth_nerve_palsy

   Sixth nerve palsy, or abducens nerve palsy, is a disorder associated with dysfunction of cranial nerve VI (the abducens nerve), which is responsible for causing contraction of the lateral rectus muscle to abduct (i.e., turn out) the eye. [1]

4. Bagolini Striated Glasses Test - Wikipedia

   en.wikipedia.org/wiki/Bagolini_Striated_Glasses_Test

   The examiner shines a torch light, directing it towards the centre bridge of the Bagolini glasses i.e. the patients nose (light is at patients eye level) from distance (6 m) or near (33 cm). The patient can also be tested in alternate positions of gaze (upgaze or downgaze). The test is usually performed at near.

5. Talk:Prism correction - Wikipedia

   en.wikipedia.org/wiki/Talk:Prism_correction

   Thank you for your time, Wordreader 17:42, 12 August 2015 (UTC) ADDITION: Should I assume that prism correction is unavailable to contact lens wearers? Thanks, Wordreader 18:17, 12 August 2015 (UTC) I'm sorry, make that "Crizal", not Crizol. Is the "fresnel prism" used in eyeglasses the same as this kind of prism?

6. Binoculars - Wikipedia

   en.wikipedia.org/wiki/Binoculars

   8×42 roof prism binoculars with rainguard and opened tethered lens caps. Binoculars or field glasses are two refracting telescopes mounted side-by-side and aligned to point in the same direction, allowing the viewer to use both eyes (binocular vision) when viewing distant objects.

7. Color blind glasses - Wikipedia

   en.wikipedia.org/wiki/Color_blind_glasses

   Strongly tinted sun glasses [24] or contact lenses [25] are often used to decrease luminosity. Red-tinted lenses are very common, but different hues are used to optimize the comfort of the wearer. [26] Achromats often use red filters while driving to help identify traffic lights when position cues are not sufficient. Similar to the operation of ...