Understanding High Index Lenses
Lens index is a number that describes how thick or thin your lenses are. The higher a lens' index is, the thinner it becomes. Higher prescriptions require higher index lenses, while lower prescriptions require lower index lenses.
What are high index lenses and what's the difference?
High index lenses are thinner, more powerful lenses. They're lightweight and stylish, but are mostly reserved for those with higher vision correction needs. While most prescriptions are compatible with more than one specific index, it's up to you to decide which one fits your personal needs!
The difference between your glasses' lens index can make a huge impact. Deciding which you should get depends on your prescription and your lifestyle. Thicker lenses are more affordable, but can only accommodate lower vision correction needs. Thinner lenses are lightweight (and more stylish!) and can accommodate MANY kinds of vision needs, including higher prescriptions.
Recommended lens index
| Lens index | Features | SPH | CYL | ||
|---|---|---|---|---|---|
| 1.61 INDEX LENS | High quality optical lenses. Great choice for lower prescriptions. | 0 to -3.00 or 0 to +3.00 | +/- 2.00
or below | ||
| 1.67 INDEX LENS | Stylish and extra-thin.
Great choice for mid-range prescriptions. | 0 to -5.00 or 0 to +5.00 | +/- 2.00
or below | ||
| 1.71 INDEX LENS | Le Seven Optical signature lenses. Best choice for a wide range of prescriptions. | -2.00 to -8.00 or +2.00 to +8.00 | +/- 4.00
or below | ||
| 1.74 INDEX LENS | Highest index rating. Thinnest among the collection. | -2.00 to -10.00 or +2.00 to +8.00 | +/- 6.00
or below |
How do I measure my PD?
Measuring your pupillary distance (PD) is super simple. While you can probably have your local optometrist help you measure it, you can also do it yourself! Just follow these easy steps on our special "How to Measure Pupillary Distance guide".
