For glasses or contact lenses, an instrument called a phoropter is used.— Find Free Articles - ArticlesBase
In Traditional (early) LASIK, a phoropter was used, which is how prescriptions are determined for glasses and contact lenses.— Find Free Articles - ArticlesBase
A phoropter is a floor-standing device with many lenses.— Find Free Articles - ArticlesBase
Instead of sitting at a phoropter, you sit at a large system which shines a light into each eye.— Find Free Articles - ArticlesBase
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