SNELLEN’S CHART
This is a special chart which shows letters that is used to test visual acuity. This is a chart show latter and numbers in decreasing size to measure visual acuity, this chart show in image.
Procedure
- No preparation is require performing test, just sit and start
- This is a non-invasive procedure for eye acuity.
- Tell the client to stand or sit distance from (6 meters) 20 feet from snellen chart.
- Tell the patient to cover one eye with palm of one hand.
- Instruct the patient to read the lefters on chart.
- After reading repeat this procedure on another eye.
- Normal results (20/20):
- The above value is the distance act which client stand or sits from chart
- The below value is the distance at which client could read letters correctly.