Multifocals are also known as Varifocals or Progressive lenses. They offer a continuous, gradual change in prescription strength from the lower (reading correction) to the upper (distance correction) portion of the lens, providing correction for all distances. Progressives lenses derive their...
Bifocals are lenses with two prescriptions on them. There is a line on the lens dividing the two zones, into distance (top) and reading (bottom). These lenses are usually prescribed for people over the age of 40, who need a...
What are they? Single vision lenses are just that; they help you with a single, particular vision correction need. These lenses have one power across the entire surface. When most people develop vision problems, they need spectacles to help them...
Photochromic lenses have an adjustable tint that changes with the amount of available light. In bright sunlight, they darken; indoors, they become clearer. The most popular photochromic lens brand right now is Transition, but there are others such as acclimates,...
Scratch-Resistant Coatings What are scratch resistant coatings? Scratch-resistant coatings can be added to finished lenses to protect them from scratches due to everyday use. Excessive scratching can compromise your vision and detract from your appearance. A lot of people place...
UV Protection What is UV Protection? Ultraviolet rays from the sun can be harmful to your eyes, and UV protection is now recommended by many eye care professionals. A UV coating can be added to your finished spectacle lenses to...
Anti-Reflective Coatings What are anti-reflective coatings? Anti-reflective coatings can be added to finished lenses to improve vision and appearance. AR coatings, as they are called, virtually eliminate the reflections from the back of spectacle lenses, such as images of your...
CONSIDERING LASER SURGERY A lot of people who wear very thick specs often ask about lasik. It is a good option for people who are very myopic (nearsighted) however, as with any procedure, there are no guarantees. To be a...
Cataract Surgery Basics (allaboutvision) In cataract surgery, the lens inside your eye that has become cloudy is removed and replaced with an artificial lens (called an intraocular lens or IOL in short) to restore clear vision. The procedure typically is...
Cataracts brought to you by the Pretoria Eye Institute : The crystalline lens, situated behind the iris, is the primary focusing mechanism of the eye. As we age, this crystal clear lens becomes cloudy and yellow and loses its elasticity,...