BIO How many times does a typical person blink her eyes in a lifetime?
Solution 21E Step 1 Here we would compute the number of times a person would compute blink his eyes in his lifetime. Consider that on average a person lives for 60 years. A human needs 6 hours of sleep every day. Thus on an average a human would keep his eyes open for 18 hours a day( One day is equal to 24 hours).