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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]
Esotropia is a form of strabismus in which one or both eyes turn inward. The condition can be constantly present, or occur intermittently, and can give the affected individual a "cross-eyed" appearance. [1] It is the opposite of exotropia and usually involves more severe axis deviation than esophoria. Esotropia is sometimes erroneously called ...
All Debt Is Bad. It’s generally wise to avoid debt, unless the alternative involves hindering your retirement plans or cutting into your nest egg. “One of the most pervasive myths among baby ...
Convergence insufficiency. Convergence Insufficiency. Other names. Convergence disorder. Specialty. Ophthalmology, optometry. Convergence insufficiency is a sensory and neuromuscular anomaly of the binocular vision system, characterized by a reduced ability of the eyes to turn towards each other, or sustain convergence .
Twenty-four hours and 26 minutes, without stopping to sleep: Nepal’s Phunjo Lama has just broken the world record for the fastest ascent of Mount Everest by a woman. Her journey from Everest ...
Al Roker and Kelly Clarkson Getty Images (2) Al Roker isn’t here for people shaming Kelly Clarkson over her decision to take medication to lose weight. “There’s too much judgment going on ...
Amblyopia. Anisometropia is a condition in which a person's eyes have substantially differing refractive power. [1] Generally, a difference in power of one diopter (1D) is the threshold for diagnosis of the condition . [2] [3] Patients may have up to 3D of anisometropia before the condition becomes clinically significant due to headache, eye ...
Costco’s new CEO reveals his winning strategy to steer the legacy retail brand into its next era: ‘We can’t become arrogant’
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