Location

1400 Wade Watts
McAlester, OK 74501

918-429-1400

Get Directions

Office Hours

Monday 8am - 5pm
Tuesday 8am - 7pm
Wednesday 8am - 5pm
Thursday 8am - 5pm
Friday 8am - 1pm
Saturday Closed
Sunday Closed

Find What You Need

 

Previous to the last few years, the only materials available for use as lenses were glass and a hard resin called CR-39. But recently, high index lenses have become available. High index materials are named because they have a higher index of light refraction. Basically, they can do the same job that glass or CR-39 does, but high index lenses are much thinner and lighter. With high index lenses, you can avoid having “soda bottle” lenses.

When learning about high index lenses, you may hear many unfamiliar numbers and terms. Here are a few things to remember.

Polycarbonate

The first and still the most popular high index plastic is polycarbonate. Polycarbonate was originally developed for fighter jet cockpits. It is very strong, very light, and resistant to scratches and breaking. Most sports lenses are made of polycarbonate.

Mid-Index

Other high index materials are classified by numbers. The higher the number, the thinner and lighter the lens. The lower numbers are classified as mid-index lenses. Mid-index lenses, such as 1.54, 1.56, and 1.57, are thinner than glass, and nearly as strong as CR-39.

High-Index

High index lense are much thinner than regular glass or plastic. Talk with your doctor to decide which high index lens is right for you.

Featured Articles

Allergies are one of the most common eye...
June 12, 2019
Kennedy Eyecare
Ocular allergies are among the most common eye conditions to hit people of all ages. Though typically worse in the high allergy seasons of spring and summer, some people suffer with these problems all year. This is especially true for people who have allergies to pet dander, mold, dust mites, and other common allergens that tend to linger throughout the year. The hallmark sign of ocular allergies is itching. While itching can be a symptom of other eye conditions, the likelihood that......

Lens Technology

Discover all the latest advancements in lens technology with our online video libray. From adaptave technology to uv filters, we have all your lens needs covered.

Kennedy Eyecare

Built on the foundation of patient convenience and satisfaction, we serve all of your family’s eye care needs under one roof. We're looking forward to seeing you!

© Kennedy Eyecare | 1400 Wade Watts | McAlester, OK 74501 | 918-429-1400 | Site Map | Email Us | Google Analytics
Text and photos provided are the property of EyeMotion and cannot be duplicated or moved.