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Phoria Card for Near with LED Light Test vertical and horizontal muscle balance at near. Used with Maddox Rod and Penlight. Referral considerations indicated on cards for imbalance beyond certain prism diopters or balance beyond specified esophoria and exophoria ranges. LED light (LED100) attached with set screw allowing you to hold unit by the light itself. Light is push on/off. Can change battery without removing from card.
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