A handheld vision test with LEA SYMBOLS®. This test features 50% spaced contour interaction bars to provide single optotype acuity with the proper crowding effect. Features optotype line sizes from 20/100 to 20/20 (6/30 to 6/6) equivalent. This book can also be used for vision testing of illiterate adults or geriatric patients. Includes a response key, instructions, and 17 pages.