MassVAT Designed by: Luisa Mayer, Ph.D. and Bruce Moore, O.D.
Can be hand-held or wall-mounted.
Acuity range 30M to 2.4M (20/200, 6/60 to 20/16, 6/4.8 equiv.)
24M and 15 M line omitted
Acuity range 12M to 2.4M (20/80, 6/24 to 20/16, 6/4.8 equiv.)
Patti Pics are calibrated symbols used for vision testing for pediatrics. These symbols include a House, Apple, Square, Circle and Star. They are calibrated to Sloan standards and help to minimize mistaken loss or gain of lines when the patient transitions from pediatric charts to adult charts. Coupled with a MassVat design, Patti Pics charts are highly accurate and usable for pediatric testing.