Chart has cord for easily achieving proper testing distance.
Near Vision Testing at 40cm: 8M (20/400) to .20M (20/10)
Intermediate Vision Testing at 66cm: 8M (20/250) to .20M (20/6.3)
Intermediate Vision Testing at 80cm: 16M (20/400) to .40M (20/10)
Memorization can alter testing results and create an inaccurate record for the patient. This near vision chart features multiple groups for repetitive testing help minimize memorization. This helps to create a more accurate and reliable vision chart that yields repeatable results.
Each side is different to minimize memorization.
Dimensions: 12 × 9 × 1 in