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We Can Make Your Lenses Ultrathin
If you don’t see well it is because the images coming from the world around you are not focused clearly on your retina at the back of your eye. Your vision can be improved by wearing prescription eyeglass lenses. Lenses bend light to focus the world clearly on the back of your retina.
Lenses slow light down so that it bends. How much this light slows and bends is a function of two things: the curves on the front and the back of the lens and the index of refraction of the material the lens is made from.
The stronger the lens prescription is the steeper the curves need to be. If you are nearsighted those steeper curves mean the lens will be thin in the middle and thick in the edge. The higher the power, the thicker the lens. Traditional designs have curves that are the same across their entire surface. Modern, digital lenses have aspheric surfaces. For nearsighted individuals that means the curves are flatter towards the edge of the lens resulting in a thinner lens that still bends light the proper amount.
Thin lenses not only look better and help you to see better but they are lighter and more comfortable.
The higher the index of refraction, the more dramatically the material will bend light and the thinner the lens will be. Traditional designs use plastic lenses with an index of 1.50. Modern lenses can have an index of refraction as high as 1.74, resulting in a 50% edge thickness reduction. The lens will bend light the correct amount and be half the weight of traditional designs.
Modern materials and designs are fantastic. But, they are of little value unless they are designed considering individual patient needs, proper frame shape and fit and style considerations of individual clients. The experience professionals at Parrelli Optical® are uniquely qualified to design the perfect eyewear for you.
