NOYOC 2 Pack Pocket Eye Chart, 2 in 1 Snellen Eye Chart 6 Feet and Rosenbaum Pocket Eye Chart, 6.5x3.5 Inches Handheld Double Sided Plastic Eye Chart for Eye Exams (2
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Sloan Revised Low Contrast Chart (Scrambled A) (Chart Distance: 3 Meter, Contrast Percentage: 25%)
What is Visual Acuity? - Precision Vision
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The Eye Phone Study: reliability and accuracy of assessing Snellen visual acuity using smartphone technology
Optometry
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A reassessment and comparison of the Landolt C and tumbling E charts in managing amblyopia
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4 Meter Vision Test with PV Numbers Optotypes - Precision Vision