With advancing technology, there are almost endless possiblities for ophthalmic lenses. We carry everything from simple single vision lenses to the brand new digitally desgined progressive addition lenses. Here is a brief description of some of the features we offer so when you visit our office you will have some ideas of what features might work best for you.
Lenses can be tinted to accent the color of an already stylish frame or can serve a purpose to help patients who are light sensitive (photophobic). Tints may even be useful for migraine headache sufferers.
Tints can be a "Solid" color, where the color is the same throughout the lens. Tints can also be a "Gradient" where the top of the lens is dark and the bottom of the lens is clear. This is useful for those who are sensitive to overhead flurescent light but don't need a tint in order to read.
Grey and brown are the two most common sunglass colors, although we can do just about anything in a sunglass lens, including mirror finishes.
For children, over 85% of UV damage is done before the age of 18 which makes it vitally important for a child to wear their sunglasses. A dermatologist would tell you that skin cancers originate from excessive sun exposure. And this holds true for the eyes, especially children.
Polarized Sun Lenses
Polarizing sunglasses eliminate reflected glare from wet road surfaces, bumpers, windshields and water on the road, lakes and rivers. This is particularly useful for drivers, boaters, fishermen, hunters and many other outdoor activities. When paired with an anti-reflective coating, you can't beat the glare protection!
Hunters tend to like yellow or orange lenses since they increase contrast during the daybreak and twilight hours. During those hours the sun is at its greatest angle with the earth and therefore light passes through a denser atmosphere. As such, light is more bluish during those hours. As this bluish light passes through a yellow lens the blue wavelength is filtered out and only the remaining colors can go through. Since the blue light can't get through the lens, blue objects appear to be darker or even black. That increases contrast against all the other colors.
Transitions and Photogray
Transition and Photogray lenses change with the light. They will get dark when you go outside, and will clear when you go indoors. The ultra-violet light is what creates a change in the chemistry of the lens and makes it darken. Transition refers to plastic lenses while Photogray refers to glass lenses. Both of these photosensitive lenses block over 95% of UV rays. However, let it be known that when in your car, the lenses are only about 25% dark. This is due to the fact that the car windshield blocks about 50% of the UV. Transitions XTRActive will darken slightly more than the traditional Transitions.
Scratch Protectant Coating
A scratch protectant coating (SPC) is a hard coat finish of silica particles that are baked on the front and back surface of the lenses. This finish resists scratches and nicks. Over a period of time, the hard coat finish will reduce scratches by approximately 75%.
When you look at a high quality camera lens you will note a purplish sheen to the surface of the lens. This is an anti-reflection coating (ARC) which is baked on the lens. This same anti-reflection coating is available in your glasses! This coating reduces reflections and glare from lights by over 80%. This feature is particularly useful when driving at night, when there is a multitude of streetlights and car lights that are reflecting off the surfaces of your lenses. It can also help with glare from computer screens, flurescent lights, and more. Cosmetically, your lenses look nicer without glare streaks.
Another cool feature of ARC is that it is "Hydrophobic". This means that water beads up on a lens with ARC on it. As noted in this example, on the right lens, water beads up and will roll off the lens when it is raining. Water spreads out on the left lens and makes it impossible to see through it. This factor also makes your lenses easier to clean and keeps them clean longer.
In addition, ARC also has the scratch protectant coating built into it to protect your lenses from scratches.