Two smaller groups 4.8M to 2.4M for repetitive testing (20/32, 6/9.5 to 20/16, 6/4.8 equiv.).
Can be wall-mounted.
If a proportionally spaced chart is too difficult for your patients, try using a chart containing a MassVAT format. Testability using the MassVAT format in young children is high. The rectangular outline surrounding the five optotypes is 50% of the width of the optotype. Thus, it provides adequate contour interaction to detect amblyopia. MassVAT Developed by: Luisa Mayer, Ph.D. and Bruce Moore, O.D. MassVat formats are available in many different style charts.