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Mid index lenses

Mid index lenses

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

Thinner, lighter and more expensive than mid-high index or hard resin lenses, high index lenses are a good choice for every day use. High Index Lenses - 1.70 and 1.74 Ultra High Index. High index lenses with 1.70 high index and 1.74 are the thinnest lenses on the market, and are made only for people with the highest prescriptions.

Bear in mind, however, that this is only a “rule of thumb” chart to be used as a general guide. Several factors, including price, should weigh in your decision to use low index, mid index, or high index lenses. If your diopter number falls between 0 and +/- 2.00, the recommended index material is 1.50. High-index plastic lenses are now available in a wide variety of refractive indices, typically ranging from 1.53 to 1.74. Lenses with an index of refraction of 1.70 or higher typically are at least 50 percent thinner than conventional plastic lenses. Also, generally speaking, the higher the index, the higher the cost of the lenses.

Comparison of high and mid index lenses with various dioptric powers. All About Lenses Rx Online Optical is your one stop shop for glasses, sunglasses and 

Jun 3, 2017 http://www.opticiansfriend.com/lenses.html It is a great mid index alternative for Rx ranges between +/-1.00D to +/-4.00D; also much cheaper  Trivex is the lightest lens material available to date. Mid and High Index – Advantage: Thinner and lighter weight lenses. Mid-Index lenses, typically with indices  Anti-Reflective Coating, High 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 :  Mid-Index: High index materials are classified by numbers. Again, the higher the number, the thinner and lighter the lens. The  Cosmetic & Specialty Tints, High 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- 

The first step towards clearer vision is learning which lens index is right for you. Our chart explains lens indexes including 1,67 and 1.74 high index lenses.

Mid-Index: High index materials are classified by numbers. Again, the higher the number, the thinner and lighter the lens. The lower numbers are classified as mid -  Mid-Index: High index materials are classified by numbers. Again, the higher the number, the thinner and lighter the lens. The  Mid-Index. Other high index materials are classified by numbers. The higher the number, the thinner and lighter the lens. The 

1.56 Index – Mid Index Thin and Light Lenses Convenient lenses for stronger prescription, they are 15% thinner than 1.5 index. They work for prescriptions with SPH +4.00, -4.00. 1.56 index is a blend of superior optics, thin and light design.

1.57 Mid Index. - Up to 15% thinner than 1.50 lens. - Suitable for full-rim plastic/ acetate or full-rim metal frames. - BEST FOR RX RANGE +2.00/-3.75 OR BELOW. The first step towards clearer vision is learning which lens index is right for you. Our chart explains lens indexes including 1,67 and 1.74 high index lenses.

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