Frequently Asked Questions
What is the GlassesOn app?

GlassesOn is a suite of optometry tools within a mobile application, developed by 6over6 on its mission to make vision care more accessible worldwide.

Is GlassesOn a medical device?

GlassesOn is registered as a Class 1 Exempt Medical Device on the FDA Medical Device Listings. However, GlassesOn does not provide medical advice, and the information it provides is for educational and informational benefit, and should not be considered a substitute for professional medical advice.

6over6 encourages you to share any information generated by the use of GlassesOn with your treating health care provider.

How accurate is your measurement?
  • Retrieved prescription details are accurate within a range of +/- 0.25 diopters.
  • Pupilary distance (PD) measurement is proven accurate within a +/- 1 mm.
Is your test a full eye exam?

No. While GlassesOn retrieves your glasses prescription and measures the distance between your pupils, there is much more to your eye health than that.

During a comprehensive eye exam, your doctor will also check your eyes for common eye diseases, and will evaluate your eyes as an indicator of your overall health.

Often, eye doctors are the first health care professionals to detect chronic systemic diseases such as high blood pressure and diabetes. Therefore, using GlassesOn does not replace regular visits to your eye doctor.

How frequently should I receive an in-person eye health exam?

The American Academy of Ophthalmology (AAO) has published official recommendations for eye health exam frequency. You should refer to their recommendations to inform your own decision.

Who can use the GlassesOn app?

Note: please read our Terms of Use carefully. It includes, amongst other information, a detailed list of conditions and illnesses that prohibit the use of GlassesOn.

You may use GlassesOn app if you:

  • are a healthy individual, 18 or older
  • have stable vision, and are happy with your current prescription
  • have a single vision prescription between -6.00 and +3.00
  • have a cylinder measurement lower than -2.50

You should not use GlassesOn app if you:

  • have a progressive, multifocal, or bifocal prescriptions
  • have a prescriptions that include a prism measurement
  • have a high single vision distance, reading, and/or astigmatism powers
  • take any medication that affects your vision
  • have any illness or condition that affects ocular health (ask your doctor)

I got an ‘out of range’ message. What does it mean?

An ‘out of range’ message means that, while we were able to measure your glasses parameters, the results fall outside of the ‘testable range’. This may be because of several reasons:

  • High-minus lenses, high-cylinder lenses and high-plus lenses: we have decided to limit our results the supported range because our main concern is the health of our users. The app is quite accurate for a wider range of optical lenses, but high power prescriptions may indicate health concerns such as retinal detachment or keratoconus, and therefore it is advisable to consult an eye care professional.
  • Low-sphere / high-cylinder lenses: in this unique case, our scan cannot identify the cylinder axis at a high enough accuracy level. Therefore such lenses fall outside of the testable range.
What should I do now, if I got an out-of-range message?

You will need to make an appointment with your vision care provider in order to get your prescription details, like you have done in the past.

What is a PD number?

The PD, or Pupillary Distance, is the distance (in millimeters) between your pupils. This measurement is important for your glasses providers, as it is used to fit your glasses to your eyes. The distance between the optical centers of your lenses should be the same as the distance between your pupils.

Do I need anything special to use the GlassesOn app?

All you need is a smartphone, a magnetic card and a computer (desktop or laptop) with a 12” screen or larger.

What devices does GlassesOn support?

To provide accurate results, we test different mobile device models in our labs before we officially ‘support’ them. Currently, our list of supported models include the following:

HTC 10
Nexus 5X
Nexus 5
Pixel 2
Pixel 2 XL
Pixel 3
Pixel XL
Nokia 6 TA-1021
OnePlus 3/3T
OnePlus 5
OnePlus 5t
OnePlus 6
Xiaomi Mi A1
Xiaomi Mi A2
Xiaomi Pocophone F1
Xiaomi Redmi Y2
New iPad 9.7
New iPad 9.7
iPad-Mini 2
iPad-Mini 2
iPad-Mini 4
iPad-Mini 4
iPad (Default)
iPhone 5S
iPhone 5
iPhone 6 Plus
iPhone 6S Plus
iPhone 6S
iPhone 6S
iPhone 6
iPhone 7Plus
iPhone 7Plus
iPhone 7
iPhone 8Plus
iPhone 8
iPhone 8
iPhone SE
iPhone SE
iPhone XR
iPhone XS Max
iPhone XS
iPhone X
Huawei P10
Huawei P10 Lite
Huawei P9
Oppo F7 Youth
Galaxy A5(2017)
Galaxy A8
Galaxy J5 (2015)
Galaxy J7 Prime
Galaxy J7 Pro(2017)
Galaxy Note5
Galaxy Note8
Galaxy Note9
Galaxy S6
Galaxy S6 Active
Galaxy S6 Edge Plus
Galaxy S6 Edge
Galaxy S7
Galaxy S7 Active
Galaxy S7 Edge
Galaxy S8
Galaxy S8 Active
Galaxy S8 Plus
Galaxy S9
Galaxy S9 Plus

If your phone model is not on this list and you’d like to see it bumped up the queue, please let us know.

What happens to the photos you record during the test?

The photos from the test are are used in real time by our algorithm to retrieve your glasses prescription and your PD, and are stored anonymously in our logs. No personally identifiable information is saved on our servers. You can learn more by reading our privacy policy.

How much does it cost to use GlassesOn?

GlassesOn is currently completely FREE to use – compare this to the typical $100 to $250 cost of an office visit.