Visual acuity 6/6
- how is visual acuity tested
- how is visual acuity assessed
- how is visual field test done
- how is visual field test performed
Visual acuity chart.
Visual Acuity Test
Two commonly used tests are Snellen and random E.
Snellen
The Snellen test uses a chart of letters or symbols. You’ve probably seen the chart in a school nurse’s office or eye doctor’s office.
The letters are different sizes and arranged in rows and columns.
Visual acuity test normal range
Viewed from 14 to 20 feet away, this chart helps determine how well you can see letters and shapes.
During the test, you’ll sit or stand a specific distance away from the chart and cover one eye. You’ll read out loud the letters you see with your uncovered eye.
You’ll repeat this process with your other eye.
Visual acuity test interpretation
Typically, your doctor will ask you to read smaller and smaller letters until you can no longer accurately distinguish letters.
Random E
In the random E test, you’ll identify the direction the letter “E” is facing.
Looking at the letter on a chart or projection, you’ll point in the direction the letter is facing: up, down, left, or right.
These tests tend to be more sophisticated when performed at an eye clinic than in a nurse’s office.
At an eye doctor’s office, the chart might be p
- how far is visual acuity test
- how is a gross visual acuity test completed