Free tools
Eye Health Tools
Seven free tools for understanding and improving your eye health. No signup, no email — just open and use.
Blink Rate Test
Most popularCount your blinks for 60 seconds and find out if your rate is healthy, below average, or dangerously low.
⏱ 60 seconds
Eye Strain Risk Calculator
Answer 5 questions about your screen habits and get a personalised eye strain risk score with recommendations.
⏱ 2 minutes
Dry Eye Risk Quiz
Answer 6 questions about your symptoms and lifestyle to find out your dry eye risk level.
⏱ 2 minutes
20-20-20 Timer
A browser-based timer that enforces the 20-20-20 rule automatically — 20 minutes work, 20 seconds rest.
⏱ Ongoing
Workspace Ergonomics Checker
Find out how much your desk setup is contributing to eye strain, headaches and postural fatigue.
⏱ 2 minutes
Blue Light Exposure Calculator
Find out how much blue light you're absorbing from screens each day and what it's doing to your sleep and eyes.
⏱ 2 minutes
Screen Time Eye Impact Calculator
Find out what your daily screen time is doing to your eyes — personalised score and weekly impact estimate.
⏱ 2 minutes
Want real-time data?
These tools give you a one-time snapshot. blink! gives you continuous, live data — tracking your blink rate all day so you know exactly when your eyes are at risk.
Get blink! — £14.99