How to Use the Eye Fatigue Screen Time Calculator
Enter your total daily screen hours and longest single session to get your eye fatigue level and recommended number of 20-20-20 breaks. Include all screen time: work, study, and leisure combined.
Eye Fatigue Level Reference
| Screen Time | Fatigue Level | Typical Symptoms |
|---|---|---|
| 4 hours or less | Low | Usually no problem |
| 4–6 hours | Moderate | Dry eyes, mild fatigue |
| 6–8 hours | High | Headaches, blurred vision |
| Over 8 hours | Very High | Dry eyes, headaches, concentration loss |
The 20-20-20 Rule
Every 20 minutes, look at something 20 feet away for 20 seconds. This simple habit relaxes the ciliary muscles and significantly reduces digital eye strain throughout the day.
Frequently Asked Questions
Every 20 minutes, focus on an object 20 feet (6 m) away for 20 seconds. Recommended by the American Academy of Ophthalmology to reduce digital eye strain.
More than 20 minutes without a break starts to fatigue the eye muscles. If that is not possible, aim for at least one break every 40–50 minutes.
Brightness adjustment, regular breaks, and proper screen distance have a more direct effect on eye fatigue than blue light filters.