When buying new eyeglasses, one of the most important choices you’ll make is the lens index. This number determines the thickness, weight, and clarity of your lenses.

In this guide, we’ll explain different lens index options and help you choose the best one for your prescription.

1. What is a lens lndex?
2. How to choose lens index/sllac lens package?
3. What's the difference between 1.59 index and 1.61 index lenses?
4. Who should consider high index lenses?

1. What is a lens lndex?

The lens index refers to the refractive index of a lens, which measures how efficiently it bends light. Lenses with a higher index bend light more effectively, allowing them to be thinner while still correcting vision. The higher the index, the thinner the lens for the same prescription.

2. How to choose lens index/sllac lens package?

Here’s a breakdown of different lens index numbers and when to choose them:

3. What's the difference between 1.59 index and 1.61 index lenses?

1.61 index lenses offer a thinner and lighter profile compared to 1.59 index lenses for identical prescriptions. In contrast, 1.59 PC index lenses prioritize durability and shatter resistance, making them an excellent choice, especially for children and adults in need of enhanced eye protection.

4. Who should consider high index lenses?

• People with strong prescriptions (for nearsightedness, farsightedness, or astigmatism).
• Anyone looking for thinner, lighter lenses for comfort and aesthetics.
• Those who wear rimless or semi-rimless frames, as thick lenses can look bulky or unbalanced.

By understanding lens index options, you can choose the right lenses for a comfortable, lightweight, and stylish pair of glasses!