What Is a Keratometer? How It Works and How to Choose One
What is a keratometer? It is an instrument — historically called an ophthalmometer — that measures the curvature of the...
Articles
Ezer ERH-770 Handheld Autorefractor: Specs, Features & Practice Fit
The Ezer ERH-770 handheld autorefractor is a fully portable, pistol-grip refraction unit built on a Shack-Hartmann wavefront sensor, with a...
Autorefractor Buying Guide: How to Choose the Right Unit for Your Practice
This autorefractor buying guide is written for the person signing the purchase order, not the person reading the textbook. If...
Best Autorefractor-Keratometers (ARK) for Your Practice in 2026: A Clinician's Buying Guide
If you are shopping for an autorefractor-keratometer (ARK) in 2026, the best overall choice for most practices is the Ezer...
