Pocket Size Plastic Eye Chart, 6 3/8" x 3 ½"
Brand: Graham Field
Precise, clear, legible; provides 20/800 distance equivalent testing at 14". Pocket Vision Screener Instructions: Visual acuity (Va) can be assessed by using the Pocket Vision Screener (not to be confused with the larger Snellen eye chart). The Pocket Vi
Graham-Field 1243-1 Pocket Size Plastic Eye Chart