Iowa EyeCare is committed to giving our patients the very best services and products, including high quality eyeglasses and prescription lenses.  This includes High Index options for lighter, thinner lenses that improve the comfort and function of your glasses. 

Iowa EyeCare has new high-index materials that bend light more efficiently than the conventional plastic lenses. This means less material can be used in high-index lenses to correct the same amount of prescription. 

What is index of refraction? 

For Nerds Only

The index of refraction of a lens is a measure of ability to bend light.   Index of refraction is determined by the material in which it is made.  For the nerds reading this, you’ll be interested to know the refractive index equation: Refractive Index = velocity of light in a vacuum / velocity of light in medium… the bottom line… the higher the refractive index of a lens material, the thinner a corrective lens can be made.  

High Index (left) verses Conventional Plastic (right)

The higher your prescription, the more important high-index material becomes.  Iowa EyeCare also recommends this material for certain frame styles.  Ask the expert frame stylists at Iowa EyeCare about high index lenses in your next pair of glasses. 

Iowa EyeCare is located in Cedar Rapids, Marion, and Robins, Iowa.  Click here to schedule an appointment with one of our talented eye doctors.