Wide spaced for optotype isolation.
Can be wall-mounted.
Made of high strength polystyrene.
Non-reflective and easy to clean.
Patti Pics symbols are calibrated to Sloan standards. This calibration helps because when the child transitions from children’s chart to adult acuity tests, there will be no mistaken loss or gain of lines. This helps create a more accurate testing record and provides a genuine acuity history.