What is 20/20 – a perfect vision for 2020 - Binyon Vision
-
By A Mystery Man Writer
-
-
4.8(455)
Product Description
A Dutch ophthalmologist, Dr. Herman Snellen, developed the 20/20 measurement system for visual acuity in 1862. Could he even have dreamed that 158 years later optometrists all over the US would be doing a happy dance that the year 2020 is going to be their year. What is 20/20 vision? In the Snellen measurement system