Ophthalmic Technician how-to
How to Measure Visual Acuity
Accurate acuity tests are the foundation.
Quick answer
Accurate acuity tests are the foundation. In short: seat; cover; ask, then complete the remaining steps below.
Step by step
Seat the patient at the correct distance.
Cover one eye.
Ask the patient to read the smallest line.
Record results.
Test the other eye.
Use a pinhole if vision is reduced.
Safety reminders for ophthalmic technicians
- Clean equipment between patients
- Check allergies before drops
- Warn patients about dilation effects
- Follow infection control
Key terms
Visual acuity · Snellen chart · Tonometry · Dilation · OCT · Visual field: see the full ophthalmic technician glossary.