OpenOptix NCLE Study Guide

Welcome to the project page for the OpenOptix NCLE Certification Study Guide. The Open NCLE Study Guide is the product of the OpenOptix initiative, a communty effort designed to produce free and open optical knowledge content and improve optical care worldwide....

Interactive PAL Chart (old)

The ever-popular LKO PAL Chart has been made even better and superceded by our the Lens Availability Database. The Lens Availability Database contains the most up-to-date lens data available on the web and includes advanced search features. We're sure you'll like the...

Basic Refraction Procedures for Opticians

Many opticians around the country have shown great interest in learning the procedures involved but have been unable to take a course on the subject. This article is designed to introduce the subject to those interested, and to provide some continuing education to...

The Electromagnetic Spectrum

Produced by the nuclear cauldrons of stars and all matter in the cosmos, energy in the form of electromagnetic radiation permeates our entire universe. Every second of every day we are bombarded with and surrounded by electromagnetic radiation; some bounces off of our...
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