This is Stephen's Quintet, A compact group of galaxies, discovered about 130 years ago, located about 280 million light years...

1. Choose and Adjust Frame a. when choosing a frame be aware of your B measurement (frame depth) b. avoid...

This is a very basic and simple approach to explaining aspheric lenses. They feature a different lens design than the...

Vitamin A - We all remember our mothers telling us to eat our carrots so we could have eyes like...

The Development of Opticianry In early times customers made their selection from a tray of eyeglasses which were already assembled...

Different lenses have different properties. The density varies, known as index of refraction, and the ABBE VALUES are different for...

FACT – UVA & UVB RAYS ARE HARMFUL More and more people are aware of the dangers caused by the...

All about anti–reflective coatings Anti-reflection coatings are made from extremely thin layers of different dielectric materials that are applied in...

SLAB-OFF EXPLAINED On occasion we have patients who come in with a prescription showing a significant power difference between the...

The Issue of Adaptation "These aren't working for me." This isn't what we want to hear from our patients. Before...