Why Do We Blink? How Often, and Why Screens Make Us Blink Less
You blink thousands of times a day without noticing. Each blink has a job.
Three kinds of blink
Cleveland Clinic describes blinking as a natural reflex run by the autonomic nervous system, so you do not have to think about it. It lists three types:
- Spontaneous blinking, the most common type, which happens subconsciously like breathing.
- Voluntary blinking, when you blink on purpose.
- Reflex blinking, the corneal reflex, when something gets too close to your eye, such as dust or a fast-moving ball.
What each blink does
According to Cleveland Clinic, each blink protects your eyes from irritants and dangerous objects, spreads tears across the eyeball to keep it lubricated, removes dead cells, dried tears and debris, and sends oxygen and nutrients to the eye. Without blinking, eyes would be dry, uncomfortable or painful, vision would be less clear, and the risk of eye infections would be higher.
How often
Most adults blink about 14 to 17 times a minute, which Cleveland Clinic puts at roughly 840 to 1,020 blinks an hour. It notes this is an estimate and that some people blink less and some more.
Screens
Cleveland Clinic says research suggests we blink far less in front of a computer, dropping to about five times a minute. That can lead to eye strain, fatigue and chronic dry eye. It suggests the 20-20-20 rule: for every 20 minutes of screen time, look at something at least 20 feet away for at least 20 seconds.
When to see a doctor
Cleveland Clinic says there is no number that defines too much blinking. It becomes a problem when it gets in the way of daily life, and causes can include eye strain, allergies, dry eye, infections or eye injuries. See an eye doctor if you are worried. This is general information, not medical advice.
Sources
- Cleveland Clinic, Blinking (medically reviewed, last updated October 4, 2023): https://my.clevelandclinic.org/health/articles/blinking
Facts checked: October 12, 2026.