Why are spectacle lens measurements important?


We are revolutionizing the direct-to-consumer eyewear industry with our patented photographic measurement system. This system allows us to keep our costs down, it’s elegant in its simplicity, but most of all we love the accuracy of our results. Our patented photo measurement system ensures that every David Kind customer receives the perfect pair of frames with accurate prescription lenses.




Our Home Try-On experience is the way most of our customers prefer to discover their frames. What really makes David Kind’s buy and try-on process unique is the photo of the final measurement that is requested at the time of purchase. We use this photo to score your pupils to determine pupillary distance and vertical height measurements. These are the same measurements that your optometrist’s office or the optical store will collect in person. That being said, each pair of frames will suit each person in a different way. Our proprietary technology is essential in calculating pupillary distance, ocular center, and segment height to ensure lens accuracy for your prescription.




These measures are extremely important to us and to our team. Your doctor, optician or our photographic technology can accurately capture them. Our patented system allows David Kind to decrease the rate of eyeglass redesign from a national average of 11% (this includes in person) to a whopping 3%, something our team is very proud of.Interested in learning more? Below we outline some key details about these measures. Plus, learn how our patent plays a crucial role in ensuring the clearest, most comfortable vision. You can know moreabout our patent here.



What is your pupillary distance (PD)?

Your pupillary distance is the horizontal distance between your eYes. This is measured in millimeters and usually does not change after adulthood. It will ensure that you are looking through the sharpest part of the lens.

What is your Ocular/Optical Center Height (OC)?

Your OC height is the vertical center of the lens measured from the bottom of the lens to the center of the pupil. This measurement changes drastically depending on the frame you choose. While most online eyeglass brands will center this measurement, David Kind is the only company that integrates precise vertical height measurements. This look is a great example of why we need a photo of each customer taken in their selected David Kind frames.

What is its segment height (SEG)?

This measurement is specific to a progressive or bifocal lens and allows you to achieve near, intermediate, and far corrections. SEG Height is the vertical position where the eye sits inside a lens and is measured from the bottom of a frame. Your optician can modify it based on your lifestyle and intended use (driving, computer, etc.).




While many direct-to-consumer brands offer “virtual” trials, our in-Home trial experience allows each customer to physically experience our frames. Together with our proprietary photographic technology, we are able to capture the small measurements that may be overlooked or ignored. Inaccurate measurements can cause visual distortions, headaches, dizziness, and blurred vision. Ultimately, if these measurements are incorrect, the final frames may look great, but the wearer will never feel completely comfortable in their lenses.

If you have any questions, please contact[email protected]. We are here to help!


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