Font sizes used in Snellen chart when viewed at 20 feet and

Subjective colour preference

Font sizes used in Snellen chart when viewed at 20 feet and adapted

Subjective colour preference

James MORRISON, Professor Emeritus, B.Sc.Mechanical Engineering, Ph.D. Bioengineering, Simon Fraser University, Burnaby, Biomedical Physiology and Kinesiology

Font sizes used in Snellen chart when viewed at 20 feet and adapted

James MORRISON, Professor Emeritus, B.Sc.Mechanical Engineering, Ph.D. Bioengineering, Simon Fraser University, Burnaby, Biomedical Physiology and Kinesiology

Font sizes used in Snellen chart when viewed at 20 feet and adapted

Font sizes used in Snellen chart when viewed at 20 feet and adapted

Subjective colour preference