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HOTVAX Acuity Guide

• Project on Your Browser Drag Window to size of
  screen.
• Measure width of the 20/100 H (not surround
  bars) in millimeters
• Place your computer screen this distance (D) from
  the patient
• D (feet) 10.0 x (H/25)
• D (m) 3.05 x (H/25)
• Monocular acuity assured by patch
  (www.abcd-vision.org)
• Child passes with two correct out of three, fails
  if more than one missed. (probability of guess
  0.028)
• If unable to pass, place card with pinhole over
  unpatched eye, and/or try with both eyes
  unpatched.

www.abcd-vision.org