Manual Phoropter Guide: Anatomy, Specs and a Buying Checklist
A manual phoropter is still the instrument most US exam lanes refract with. It is a mechanical refractor: every lens...
Articles
Non-Contact Tonometers: How Air-Puff IOP Measurement Fits a Clinic Lane
A non contact tonometer is the instrument most practices reach for when intraocular pressure has to be captured quickly, by...
Digital PD Meter and Pupillometer: What Actually Matters in the Dispensary
A digital PD meter — the instrument most opticians still call a pupillometer — does one small job that almost...
Ophthalmic Exam Chair and Stand: What to Check Before You Buy
An ophthalmic exam chair is the one piece of equipment in the lane that every single patient touches, that no...
Ezer ERK-BH Autorefractor Keratometer: Full Specs and Practice Fit
Most write-ups of the Ezer ERK-BH autorefractor stop at two numbers: a dioptric range of −30.00 to +25.00 D and...
Slit Lamp Microscope Optical Systems and Magnification: What to Specify Before You Buy
Every slit lamp microscope quote you receive names an optical system — Galilean, converging, Greenough, continuous zoom — and lists...
