Because that is how much time it takes to blink your eyes. When you are driving 60 mph, literally in a blink of an eye, you move On average the human blink lasts only a tenth of a second which is milliseconds. Sometimes, it can even last up to milliseconds. According to optometrists, the human eye blinks an average of 4,, times a year which corresponds to approximately 12, times per day!
Excessive blinking can be caused by problems with the eyelids or anterior segment front surface of the eye , habitual tics, refractive error need for glasses , intermittent exotropia or turning out of the eye, and stress. It is very rare for excessive blinking to be a sign of an undiagnosed neurologic disorder.
The eye produces tears to lubricate the eyeball at all times. Blinking just washes the surface a little better I think. Your eyeballs are still lubricated while you are sleeping even thought the lids are closed. Over-the-counter artificial tears can ease the arid sensation, but sometimes dry eye means there is an underlying health problem. People with lupus, rosacea, arthritis and other autoimmune conditions usually have dry eyes. As people age, tear production diminishes and dryness becomes a problem; in fact, most people over the age of 50 need artificial tears to lubricate their eyes.
Mites, microscopic bugs that cling to eyelashes and feed on sebum, also cause dry eye and therefore excessive blinking. Although this sounds like the stuff of nightmares, getting rid of them is easy. Most eye doctors recommend applying warm washcloths over the eyes and massaging the eyelids.
In rare cases, prescription and over-the-counter drugs can cause dry eye. If this is the case, the easiest solution is speaking with the doctor who prescribed the medication so that they can recommend a treatment for dry eye or prescribe a different medication that does not have dry eye as a side effect. Gabriella Munoz is a freelance writer based in Melbourne. She was the editor of Science Illustrated Australia.
She has written for many international science publications, including Muy Interesante, ScienceAlert and Wonder of Science. Gabriella has been teaching science communication to undergraduate students since Physical Effects of Playing the Trumpet.
How to Make Saline Solution? All of these functions also help prevent eye infections. A common reason you may blink less often is due to computer vision syndrome. This can happen when you use a computer for a long time without a break. You may also blink less frequently due to problems with your eyelid. Eyelid issues may be caused by:. In rare cases, frequent blinking may be a sign of a more serious condition. Conditions that may cause frequent blinking include:. However, if blinking frequency is accompanied with other symptoms, it could be due to something more serious.
On average, most people blink 15 to 20 times per minute. This helps your eyes stay healthy by keeping them oxygenated and moist, and clearing out debris. While there are some conditions that can cause you to blink more or less frequently, a change in your rate of blinking is rarely a sign of a serious issue.
If you notice changes in your blinking and signs of an eye infection, neurological symptoms, or a recent eye injury, talk to your doctor. In this case, it may be a sign of a more serious condition.
Your eye may hurt when you blink for a variety of causes, but eye pain treatments can help. Here's what you need to know. Have trouble blinking or closing your eyes to sleep?
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