If you’ve got questions about lens thickness, then this little FAQ guide is the place you want to look first. It’s time to brush up on some basic lens thickness knowledge from some tips from the smartest folks on the EyeBuyDirect team!

What kind of different lens thicknesses are there?

There is a large selection of different lens thicknesses. Read on, and see which one is best for you!

1.5 Index — Standard Lens These lenses are thicker than most, and only accommodate lower prescriptions. However, they so affordable they come included with every EyeBuyDirect frame. Free of charge!

1.57 Index — Thin and Light Lens For people with somewhat stronger prescriptions. These lenses are thinner and lighter, and handle SPH corrections between +/-5.00 and +/-4.00, and CYL corrections of +/-3.00 and below.

1.59 Index — Polycarbonate Lens Lenses in this index are made out of a special polycarbonate material. This means that they’ve got 100% UV protection added on top of them! They’re durable and impact-resistant, which also makes them perfect for everyone. Active people and children included.

1.6 Index — Super-Thin Lens Now we’re entering “high index lens” territory. Stylish and super-thin, these lenses are an excellent choice for people with strong prescriptions between SPH +/-4.25 and +/-6.75, and CYL corrections between +/-2.25 and +/-3.00.

1.67 Index — Ultra-Thin Lens These lens are even thinner. If you have a particular strong vision needs (SPH corrections between +/-7.00 and +/-9.00, and CYL corrections between +/-3.25 and +/-4.00) these are the choice for you.

1.74 Index — As Thin as Possible Lens Any thinner and they would disappear! These lenses are best for prescriptions with SPH corrections of +/-9.25 and above, and CYL corrections between +/-4.25 and +/-6.00.

What lens thickness should I get?

The lens thickness 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 accomodate ALL kinds of vision needs, including higher prescriptions! A good compromise lies in 1.59 index polycarbonate indexes, which accommodate most prescriptions and are extra durable.

How to measure PD?

Measuring your pupillary distance (PD) is super simple. You can even do it yourself! Just follow these easy steps:

  1. Print our downloadable PD ruler
  2. Place the ruler directly over the center of your right pupil so that the ruler is horizontal. Place against forehead for added stability. Stand in front of a mirror, or ask someone else to measure for you.
  3. While looking straight ahead, measure the distance from the center of your right pupil to the center of your left pupil.
  4. Repeat a couple of times for accuracy. Then, use the average for your final measurement!

There are even smartphone apps available that will let you measure your pupillary distance friend on the go. Talk about convenient. As always you can also just have your personal optometrist help you at your next checkup. We hope we’ve answered some of the questions you had about lens thickness! If you want to learn more: such as details about single vision lenses, aspheric lenses, and how we measure to lens width, you can check out our FAQ and guides page here.