Snap-On vision charts are easily changeable to accommodate different language symbols. The standards are Numbers, Letters, Landolt C, and Tumbling E. Call and ask for pricing of custom charts. For ETDRS charts the substrate is opaque, which reduces illumination to 85 cd/m2 for reading. For potential Vision charts, the substrate is translucent, which allows chart illumination up to 6000 cd/m2.
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Download MacHealth from Apple (QR on iPhone, pay 99 cents fee for 30 tests.) Perform 3 tests on each eye and send me the results using NUMBERS for ID (do not use a real name due to patient identification.) When receive your results, I will notify you, if they qualify, I will send $1.00 for the app. Try several tests to get use to the easy test. I will reimburse the first 1000 MacHealth test. Send to ajh@amaoptics.com.
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