Refraction assessmentBy Mayo Clinic staff
Original Article: http://www.mayoclinic.com/health/medical/IM03547
- Visual acuity test
- Manual visual field testing
- Refraction assessment
- Slit-lamp examination
- see all
To determine your prescription for glasses, your doctor does a refraction assessment. He or she asks you to look through a mask-like device that contains wheels with different lenses of different strengths (phoropter) to help judge which combination gives you the sharpest vision.