by Keith Benjamin | Nov 28, 2023 | Lens Options and Materials
Poly and Trivex Lenses: Facts and Fiction Even though Trivex has been available for years and polycarbonate for decades, there is still much debate, confusion and even long-held myths about how Trivex and polycarbonate stack up against one another in the world...
by Keith Benjamin | Nov 4, 2023 | Occular Anatomy
Layers of The Eye: Overview The human eye is a complex organ composed of several layers, each with a specific function. Here's a brief overview of these layers, starting from the outermost to the innermost: 1. Cornea and Sclera (Fibrous Tunic): Cornea: The transparent...
by Keith Benjamin | Mar 4, 2023 | Lens Options and Materials
What is an AR (Anti-Reflective) Coating? An Anti-Reflective (AR) coating, also known as anti-glare coating, is a thin multilayer finish applied to the surface of eyeglass lenses. This coating is designed to reduce the amount of surface glare that reflects off the...
by admin | Oct 30, 2019 | Lens Form and Theory
Normally, eyeglasses are fitted with the optical center of the lens directly in front of the eye. If the lens is fit off-center, image displacement can occur due to induced prism. The higher the power or the further the lens is fit off-center, the higher is the...
by admin | May 25, 2010 | Surfacing
The curvature of a progressive addition lens surface gradually increases toward the bottom of the lens, becoming increasingly steeper. This increase in curvature (and surface power) is what produces the add power of the progressive lens. Unfortunately, because the...
by admin | May 25, 2010 | Surfacing
Often, it is beneficial for the eye care professional to predict the finished thickness of a pair of spectacle lenses. Determining the change in thickness that results from the patient's use of a different frame or lens style is a common example.Patients investing a...
