Professional Project: Jessica Mevius, OT Graduate Student
For the aging population, one of the most important occupations is maintaining independence through mobility for as long as possible.
The Snellen Chart is used to test visual acuity. The client is asked to cover one eye and read the letters out loud, starting at the top of the chart and working his/her way down until one complete row can no longer be read. Each eye is tested separately and then both are tested together. Visual acuity is then expressed as 20/20, or a similar number, meaning the smallest letters accurately read on the chart.36
The original Snellen Chart only has the ten letters C, D, E, F, L, N, O, P, T, Z but there are many different variations available today.
Where to Obtain
Who is originally responsible for this Tool?
Snellen Charts are named after the Dutch ophthalmologist Herman Snellen. He developed the chart in 1862.