The 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.

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.

• Reading text in 12 sizes from N48 to N5
• Provides various testing distances from 33cm to 6 metres (3 metres on phone)
• Choice of letters or pictures for testing
• Offers single, crowded and chart presentation
• Displays LogMAR notation, plus metric or imperial Snellen or Decimal
• Easy to increase and decrease the size displayed
• Simple to refresh the optotypes or text on screen
• Records visual acuity results for each eye
• Saves your acuity results for later review in test history

Kay iSight Test Professional is free to download and allows you to perform trials using each of the sight test and reading test options. To obtain full access to unlimited visual acuity and reading testing and to record and save results you need to purchase an auto-renewing subscription on a monthly or yearly basis. A 7 day free trial period is available to new users at the start of subscriptions to fully test the app before payment is taken.

Price may vary by location. Subscriptions will be charged to your credit card through your iTunes account. Your subscription will automatically renew unless cancelled at least 24 hours before the end of the current period. You will not be able to cancel a subscription during the active period. You can manage your subscriptions in the Account Settings after purchase. If you purchase a new subscription during a free-trial period you will forfeit any free-trial time remaining from your first subscription.

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What’s New

Version 2.0

The addition of reading text in short paragraphs and single, high frequency words from sizes N48 to N5.

Ratings and Reviews

1.0 out of 5
1 Rating

1 Rating

CJChristian ,


To increase the charge at a time of crisis!!


Kay Pictures Limited
19.2 MB

Requires iOS 11.0 or later. Compatible with iPhone, iPad, and iPod touch.



Age Rating
Frequent/Intense Medical/Treatment Information
In-App Purchases
  1. Monthly $4.49
  2. Annual $28.99


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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