What is the average blink rate per minute during screen use?

During screen use, the average blink rate drops significantly to about 5 to 7 times per minute (or 4 to 5 times per minute when reading)^[1][2]. Compared to normal resting conditions—where a person typically blinks 15 to 20 times per minute—this represents a reduction of approximately 66%^[3].

This sharp decrease in blinking is driven by high cognitive demand and intense visual concentration, causing the brain to prioritize visual intake and suppress the natural blink reflex^[4]. Eye strain mechanics stem from several interrelated issues:
* Tear Film Instability: With fewer blinks, the protective tear film evaporates rapidly, creating dry spots on the cornea that lead to burning, grittiness, and fluctuating vision^[5].
* Incomplete Blinks: Screen work increases the frequency of partial blinks where the upper eyelid fails to touch the lower one, leaving the bottom portion of the cornea unlubricated and irritated^[6].
* Gland Dysfunction: The mechanical action of a full blink activates the meibomian glands to release essential oils that seal in moisture; lacking this regular cycle can lead to chronic dryness over time^[7].