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Updated: Jul 26, 2026

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Long-term trends in human eye blink rate

A W Monster, H C Chan, D O'Connor

    Biotelemetry and Patient Monitoring
    |January 1, 1978
    PubMed
    Summary

    Human eye blink rate exhibits periodic trends and distinct behavioral states, with variations in blink amplitude correlating with vision-related behaviors. These findings offer insights into normal human blinking patterns.

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    Area of Science:

    • Ophthalmology
    • Neuroscience
    • Behavioral Science

    Background:

    • Human eye blinking is a complex behavior with poorly understood temporal patterns.
    • Previous research has not extensively documented long-term, continuous recordings of natural eye blink behavior.

    Purpose of the Study:

    • To investigate periodic trends and behavioral state correlations in human eye blink rate and amplitude.
    • To explore the functional significance of blink rate and amplitude variations, particularly in relation to vision-based behaviors.

    Main Methods:

    • Continuous, long-term recordings (up to 14 hours) of normal human eye blink behavior.
    • Analysis of blink rate (blinks/min) and blink amplitude variations over time.
    • Identification of periodic trends and correlations between blink parameters and behavioral states.

    Main Results:

    • Observed periodic trends in blink rate with periods ranging from 10 minutes to 2.5 hours.
    • Identified three dominant groupings of mean blink rates (under 6, 8-15, and 20-30 blinks/min), linked to distinct behavioral states.
    • Found correlations between blink amplitude and rate, suggesting functional significance, and noted that vision-related behaviors influence blink patterns, potentially leading to bimodal blinking.

    Conclusions:

    • Human eye blink behavior is characterized by periodic trends and distinct rate groupings associated with behavioral states.
    • Blink amplitude and rate are functionally correlated, and vision-related activities can modify blinking strategies, including the emergence of bimodal blinking.

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