In reality, the famous phrase “blink of an eye” lasts only forone-tenth of a second, but that’s all it needs to clear away dirt bits and spread greasing fluids across the eyeball. Each time you blink, your eyelids smear a concoction of oils and mucous discharges across the surface of the eye to keep your eyes from drying. Blinking also keeps eyes safe from potentially damaging stimuli like foreign bodies,dust and bright lights.
Blinking also safeguards the eye from irritations. Eyelashes are hairs on the upper and lower eyelids that form a line of defence against other elements like dust to the eye. The eyelashes stop most of these irritants before they influence the eyeball.
Blinking can be of two types. The first being impulsive blinking which happens without internal effort and external stimuli. This form of blinking takes place in the promoter brain stem and takes place without conscious effort, like digestion and breathing. The second type of blinking is spontaneous reaction. This blink is the reaction of an external stimulus like contact with the cornea or articles that come rapidly towards the eye. A reflex blink is not essentially a cognizant blink either; however it does occur quicker than a spontaneous blink.
Newborns do not blink at a similar rate of grown ups; in truth, babies only blink at an average frequency of one or two times in a minute. The cause for this variance is unknown, but it has been put forward that infants do not have need of the same amount of eye lubrication that grown-ups do as their eyelid opening is lesser in comparison to adults. Furthermore, newborns do not produce tears for the duration of their first month of life. Infants also get a significant amount more sleep than adults do and, as discussed earlier, fatigued eyes blink more. However, all through childhood the blink rate intensifies, and by teenage years, it is usually equivalent to adults.