Phoropters

With a long history and technological advancements, phoropters are incredibly complex and continue to evolve today.

So, What Is a Phoropter?

Patients sit behind phoropters during eye exams.

These instruments, which look like mechanical masks, check and verify a patient’s optical prescription—but can also be used to measure:

• The eye’s natural resting position
• Focal ability
• Eye movements
• Binocular vision

Made up of cylinders, prisms, and lenses, this instrument is most commonly used to measure the eye’s refractive error.