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  2. Prism (geometry) - Wikipedia

    en.wikipedia.org/wiki/Prism_(geometry)

    In geometry, a prism is a polyhedron comprising an n-sided polygon base, a second base which is a translated copy (rigidly moved without rotation) of the first, and n other faces, necessarily all parallelograms, joining corresponding sides of the two bases.

  3. Prism cover test - Wikipedia

    en.wikipedia.org/wiki/Prism_Cover_Test

    The prism cover test ( PCT) is an objective measurement and the gold standard in measuring strabismus, i.e. ocular misalignment, or a deviation of the eye. [1] It is used by ophthalmologists and orthoptists in order to measure the vertical and horizontal deviation and includes both manifest and latent components. [1] Manifest is defined by the eye deviating constantly or intermittently ...

  4. Binoculars - Wikipedia

    en.wikipedia.org/wiki/Binoculars

    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. Most binoculars are sized to be held using both hands, although sizes vary widely from opera glasses to large pedestal -mounted military models.

  5. Protection from Online Falsehoods and Manipulation Act 2019

    en.wikipedia.org/wiki/Protection_from_Online...

    The Protection from Online Falsehoods and Manipulation Act 2019, commonly abbreviated as POFMA and known colloquially as Fake News Law, [2] is a statute of the Parliament of Singapore that enables authorities to tackle the spread of fake news or false information. The law is designed specifically to allow authorities to respond to fake news or ...

  6. Congenital fourth nerve palsy - Wikipedia

    en.wikipedia.org/wiki/Congenital_fourth_nerve_palsy

    Prism lenses set to make minor optical changes in the vertical alignment may be prescribed instead of or after surgery to fine-tune the correction. Prism lenses do not address torsional misalignment and this may limit their use in certain cases.

  7. Hypertropia - Wikipedia

    en.wikipedia.org/wiki/Hypertropia

    Hypertropia is a condition of misalignment of the eyes ( strabismus ), whereby the visual axis of one eye is higher than the fellow fixating eye. Hypotropia is the similar condition, focus being on the eye with the visual axis lower than the fellow fixating eye. Dissociated vertical deviation is a special type of hypertropia leading to slow ...