Single-vision lenses offer one correction throughout the entire lens (typically for distance or reading) while progressive lenses offer multiple corrections in one lens, providing transition from distance correction on top to reading correction on bottom. This means you can do not need multiple pairs of glasses for different situations.

OS (oculus sinister) means the left eye and OD (oculus dextrus) means the right eye. The further away from zero the number on your prescription, the worse your eyesight and the more vision correction (stronger prescription) you need.  A “plus” (+)  sign means you are farsighted, while a “minus” (-) sign means you are nearsighted.

If there are three numbers in your prescription, you have astigmatism. These numbers are written as S x C x Axis. The S is "spherical", which refers to nearsightedness or farsightedness discussed previously. The C refers to the "cylinder" or astigmatism, and can be a negative or a positive number. The bigger this number, the more astigmatism you have. The Axis is a number anywhere between 0 and 180 degrees. It reveals the orientation of the astigmatism. It is not enough to specify how much astigmatism there is; we have to know where the difference in curvature is taking place in order to successfully fulfill your prescription.

No, contact lens prescriptions are different than glasses prescriptions, so you cannot use a contact lens prescription to order glasses.

Yes, your RX for sunglasses will be the same as your RX for your glasses.

All prescriptions are determined by an Optometrist.

Pupillary Distance, the distance in millimeters between your pupils.

Go to your local optometrist and receive a prescription, including your PD, or pupillary distance, from them.

Yes, but you will need to determine if you would like the prescription to be filled for distance vision or near vision (readers).

Lens power is affected by how close a lens sits to the eye. This is called Vertex Distance. A minus lens moved closer to the eye gets stronger while a plus lens moved closer to the eye gets weaker. By default throughout the optical industry 10mm is the accepted vertex distance which coincides with how far doctors will normally conduct a patient refraction. This distance definitely varies from person to person due to the way our noses are wider, longer, sitter higher up, etc. from one another but this distance should be around 10mm.

All of the frames in our Austin Collection have three nosepad sizes for you to find the optimal fit for your nose bridge width.

1. Choose up to 4 frames to try on.
2. We ship you demos of your picks.
3. Try them for up to 7 days.
4. Order your new glasses at any time. Any fees go towards purchase price.
5. Return all of your demos with free shipping

Yes! These programs do not overlap, so you can't add sunglasses and optical styles to the same Home Try-On kit. The sunglasses are actual finished goods so you can keep the pairs you'd like, but the eyeglasses are demo pairs that must all be sent back. You can order your prescription eyeglasses as a separate transaction at any point in the process.

We use a demo fleet because the vast majority of eyeglasses purchased will be with prescription included, which we cannot fill for a home try-on order. Once you find the perfect pair among the demos you selected, you can order that pair with prescription at roka.com.

No. At the present time, sunglasses and eyeglasses are separate home try-on programs so you can not mix the two categories.

Yes. You can order both a sunglass and eyeglass home try-on box concurrently, but these will be treated as two separate trials with individual handling fees.

The minimum number of pairs for either home try-on box is two. The maximum is four pairs.

You can try your demo frames at home for up to seven days.

Simply re-pack the frames in the box you received it in, affix the prepaid returns label on the outside of the white box and drop it off at your local UPS store.