Discover MIRA. Next generation pupillary distance (PD) measurements.

What is MIRA?
Using only a phone or tablet and a mirror, our app accurately calculates your Pupillary Distance (PD), from the comfort of your Optical Store or your own home. With MIRA you can also measure all the required parameters that are needed for progressive lens fitting. Parameters such as the MonoPDs, Fitting Heights, Vertex Distance, Pantoscopic Angle, Box sizes, Wrap angle and Near Lookout Point can be measured.

Why use MIRA?
MIRA is different from other PD measuring applications, with our technology there is absolutely no need for a scaling device. Our sophisticated algorithms calculate your pupillary distance measurements by taking a 3D scan of your face and eyes and deliver all key details needed to make you perfect glasses. MIRA has a 0.5mm standard deviation in accuracy, which means that MIRA is just as accurate as a high street optician. As an optician you can measure your customers easily right on the spot, but also the images are saved, so they can be evaluated at a later point as well.

How does MIRA work?
First, there is a trial period, but generally MIRA is subscription based. There is a weekly, a monthly or an annual subscription option in a form of in-app purchases. In order to learn to use MIRA we recommend You to watch our tutorial videos before taking the first measurement:
Tutorial video for evaluation:
Tutorial video for image taking:

What is Pupillary Distance (PD)?
Pupillary distance is a distance between the centres of the pupils, which is widely considered the most basic measure in optics.

How is PD measured?
Traditionally, you need to visit your optician to get your PD measurement. The measurement is usually made with a millimetre ruler (PD stick). The optician puts the ruler to the patient's head and closes one eye. The optician asks the patient to look into the open eye. Then the optician lines up the ruler with the pupil. This is repeated for the other side.

What is PD used for?
The pupillary distance is mostly needed for prescription eyeglasses. It is used to position the lenses correctly in relation to the centre of the pupils. This is especially important for higher powered lenses.

What are the usual PD values?
55-70mm for male adults, 53-65mm for female adults, 41-55mm for children.

What's New

Version 1.8.9

Update on algorithm

Ratings and Reviews

Matty-Matics ,

Cannot give a zero rating!!!

Initially when the app is downloaded there are a few “free” measurements. These didn’t materialise. I registered for 10 more. However could not sign back into the app. Very disappointed - especially when this measurement app is recommended by a glasses company!

Maegiee ,

Works well & fairly accurate

This app works well although was confusing to use at the start. Fairly accurate was sometimes 1mm out but was close enough to my actual PD distance.

Meejozzz ,

Pretty Awful interface and wrong PD.

Downloaded this as my optician forgot to put the measurement on my prescription. It took an age to set up and was incredibly fiddly. It eventually gave me a measurement of 74mm. I didn't believe this so went back to my optician who measured my PD as 66mm. That, in anyone's books is very poor. Uninstalled.


Lateral Reality Korlatolt Felelossegu Tarsasag
76.9 MB
Requires iOS 11.0 or later. Compatible with iPhone, iPad and iPod touch.
English, Arabic, Danish, Dutch, French, German, Indonesian, Italian, Japanese, Korean, Malay, Polish, Portuguese, Russian, Simplified Chinese, Spanish, Traditional Chinese, Turkish, Vietnamese
Age Rating
Rated 4+
© Lateral Reality Ltd.


  • Family Sharing

    Up to six family members will be able to use this app with Family Sharing enabled.

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