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Kay iSight Test Professional App

Available for iphones and ipads!
To download an easy step by step guide on how to install the app, click here.


If you have been asked by your eye professional to use the Kay iSight Test Pro app during the Covid-19 pandemic, please read the information in the Home User tab.

PLEASE NOTE: Due to the Covid-19 pandemic, this app is now free to use for up to 3 months until January 2021 for all first-time subscribers. To access the extended free trial period you will need to sign up for a subscription through Apple. You may cancel at any time during this period and will not be charged. When you sign up, the message will say one week free – we currently cannot change this. For further guidance, please use the step by step installation guide.

The Kay iSight Test Professional app lets you measure and record near and distant visual acuity in children from 18 months of age through to adults. It is simple and intuitive to use, making your testing quick and easy.

The app uses British and US standard letters and Kay Picture optotypes for young children and others with a learning disability. In addition, near reading text is provided as short paragraphs or single, high frequency words.

The Kay Picture Test is the only fully-validated picture vision test with accurate, recognisable pictures and evidence-based crowding. This app is CE marked as a medical device.

Research article: The Redevelopment of the Kay Picture Test of Visual Acuity


  • Choice of letters or pictures for acuity testing.
  • Various testing distances from 33cm to 6 metres.
  • NEW! Reading text in 12 sizes from N48 to N5
  • Offers single, crowded and chart presentation.
  • LogMAR.plus metric or imperial Snellen, or Decimal notation,
  • Easy to increase and decrease the size displayed.
  • Simple to refresh the optotypes on screen.
  • Records visual acuity results for each eye.
  • Saves your results for later review in test history.

You can cancel the subscription at any time during the introductory free period and pay nothing. If you wish to use the app after the free period, payment will be taken by iTunes. (£4.49 per month, or £27.95 per year)


Home User

During the Covid-19 pandemic some eye professionals are offering their patients remote support and advice in monitoring their own eye condition by a home vision test.
If you have been contacted by your eye professional, you may download the Kay iSight Test Pro and safely use it under their guidance. Patients must not test their own visual acuity without the help, advice and support of a qualified eye professional. These professional titles are ophthalmologists, orthoptists and optometrists.

Kay Pictures is not offering technical or clinical support to patients. You must contact Apple support for any difficulty with installing the app and contact your eye professional for all clinical advice and support.

To download an easy step by step guide on how to install the app, click here.

You can cancel your subscription at any time from within the app or if this function is not supported by your device’s version of iOS please read this guide showing you how to cancel through your device’s settings

Business User

If you would like to make iSight Test Pro available to a number of users within your department or practice, please refer to the Apple Business Manager Guide which can be downloaded here.

iPhone Demo

iPad Demo


For a full overview of our terms and conditions of i Sight Pro, please click here.


“Kay’s crowded picture testing using the iPad app has transformed our practice, we are so mobile and it is great for those children who usually would take a longer time to warm to you/testing!”
Laura, Senior Orthoptist, GCUH, Australia

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