Analysis of Snellen Vision Test versus Picture Test Data Comparison

The Snellen vision test was developed in the 1860’s to test for vision acuity, meaning clarity of vision. Blurry vision is the loss of sharpness in eyesight, making objects appear out of focus and hazy. The line for standard human vision is 20/20, which means a person can read the line from 20 feet and are considered to have “normal vision”. The Snellen test has been modified over the years, yet contains various discrepancies which compromise the results. The lines testing for poor vision have only 1 to 2 letters, while lines testing for good acuity have 8. The project is the comparison of two vision tests, one the standard Snellen and a Picture test used for preschoolers, to determine if an individual scores differently on the same line. Each participant will read the 20/20 line, and the score will be recorded for each test in a spreadsheet. The project determined if reading the same line, 20/20, produces different results between two tests. Data showed that there was no instance where the tests produced the same results on the 20/20 line, with a p-value of .017 there is a significant difference between the eyesight being measured between the picture and the snellen method