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  2. Prism correction - Wikipedia

    en.wikipedia.org/wiki/Prism_correction

    Prism dioptres. Prism correction is commonly specified in prism dioptres, a unit of angular measurement that is loosely related to the dioptre. Prism dioptres are represented by the Greek symbol delta (Δ) in superscript. A prism of power 1 Δ would produce 1 unit of displacement for an object held 100 units from the prism. [2]

  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. It is used by ophthalmologists and orthoptists in order to measure the vertical and horizontal deviation and includes both manifest and latent components. [1]

  4. 10 Things To Know Before Using Costco Optical - AOL

    www.aol.com/10-things-know-using-costco...

    How much does a Costco eye exam cost? Costco doesn't list exam costs on its website, but most online reports note that an eye exam there costs around $75 to $80.

  5. Four prism dioptre reflex test - Wikipedia

    en.wikipedia.org/wiki/Four_prism_dioptre_reflex_test

    Four prism dioptre reflex test. Purpose. assess alignment of both eyes. The Four Prism Dioptre Reflex Test (also known as the 4 PRT, or 4 Prism Dioptre Base-out Test) is an objective, non-dissociative test used to prove the alignment of both eyes (i.e. the presence of binocular single vision) by assessing motor fusion. [1]

  6. Vertex distance - Wikipedia

    en.wikipedia.org/wiki/Vertex_distance

    Example 1: example prescription adjustment from glasses to contacts. A phoropter measurement of a patient reads −8.00 D sphere and −5.25 D cylinder with an axis of 85° for one eye (the notation for which is typically written as −8 −5.25×85). The phoropter measurement is made at a common vertex distance of 12 mm from

  7. AI is upending eye exams for patients and providers ... - AOL

    www.aol.com/finance/ai-upending-eye-exams...

    The eye exams show that the AI’s ability to provide immediate results, as well as the cost savings and convenience of not needing to make an extra appointment, can have big benefits for both ...

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