Founded in 2015, Lensabl was created to help people replace old lenses while keeping their frames at an affordable price.


Lensabl wants to create an AR sight test for customers to measure their eyesight at home. They want to accommodate those that have a need to change prescriptions, and those that have simply lost their paperwork. 


Create an AR PD Measurement App that would encourage and enable users to order lenses through Lensabl.


Timeline: 2 weeks

Team: Jenni Sloane, Sana Ali, Preston Wheeler
Role: Lead Researcher, UX Designer
Platform: IOS App
Tools: Pen & Paper, Marvel, Adobe Xd, Illustrator


At Home Sight Test

Through Heuristic and C&C our team learned that the only accurate home sight test on the market is a telemedicine system that requires multiple apps and multiple smartphone attachments. This system covers most of the sight tests that an optometrist would perform in order to write a prescription. The cost of this system alone was far beyond the scope of our project.

Pupillary Distance Measurement

A reemerging factor, discovered during my C&C analysis, was Pupillary Distance (PD) measurement. This measurement, which is the distance between the center of the pupils, is required to order lenses or frames online. The current methods of obtaining your PD are: A) to request it from an optometrist or B) take a selfie and submit the photo online. The later method is less accurate.

How Do People Get Their Lenses?

From 24 surveys and 11 interviews with eyeglass owners, we learned users don’t know their prescription or PD measurement. We also discovered users don't know what PD is or its relevance. Users go to an optometrist because they think they don’t have choice.

What Doctors Had To Say

Since the optometrist came up in every user interview I knew we needed to talk to the experts. From interviews with an optometrist and an optician we learned that optometrists are experts on health while opticians are experts on glasses. Most optometrist offices do not provide PD on prescriptions because opticians measure PD in person. Inaccurate PD can cause headaches, dizziness, and cause severe nausea.

Our Pivotal Moment

At this point in our research I realized the scope of our project needed to change. Current tech will not be able to replace the optometrist or the full spectrum of sight tests, but an accurate AR Pupillary Distance measurement would enable and encourage users to order lenses online.

From here our team pivoted from a comprehensive AR home sight test to an AR PD measurement. Sana, our Lead Designer, had a background in VFX and her knowledge of AR tech lead us to our best bet: AR face tracking and distance measurement combined would make the most accurate PD measurement.

Illustrations by Jenni K. Sloane

Feature Prioritization

Creating a matrix plotted the hierarchy of possible features and helped us determine which features to prioritize in our design.


Testing the AR Concept

Using the Marvel app for our paper prototype we conducted 7 usability tests. Our major take aways were:


  • The beginning tutorial was lengthy, confusing, and boring.

  • Face mapping and requesting the user's credit card for a ruler raised security concerns.

  • Users doubted the accuracy of the measurement.

Balancing Clarity and Length

Moving into Adobe Xd for our mid-fi prototype we conducted 6 usability tests. Our major take aways were:


  • The order of the steps could be rearranged for a smoother workflow; users wanted more illustrations.

  • The PD measurement progress bar was unclear.

  • Users didn't outstretch their arm when prompted.

  • Users were confused on whether the scan worked or not; users still doubted the accuracy.

Rewarding Users with Visual Cues

In our hi-fi prototype we conducted 2 usability tests. Our major take aways were:


  • Users didn’t realize the onboarding tutorial contained multiple screens.

  • They felt they didn't the overall flow didn't have enough feedback. 

  • Users needed a more definitive confirmation at the end of the measurement.

  • The scan indicator color wasn't apparent enough.




From this point I would like to continue research and design for the optician chat feature, further test the AR measurement accuracy, as well as research the process of ordering lenses through the app.

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