Graduated E Cards
Graduated "E" Cards are printed on durable matte plastic. Each of Western Optical's 5" x 5" graduated E cards included visual acuity notation marked on both sideds as follows:
E-Card #1 20/15 and 20/20
E-Card #2 20/30 and 20/50
E-Card #3 20/70 and 20/100
E-Card #4 20/40 and 20/200
E-Card #1 20/15 and 20/20
E-Card #2 20/30 and 20/50
E-Card #3 20/70 and 20/100
E-Card #4 20/40 and 20/200