What's with the kid blinking?

Children always blink eyes, eye is common symptoms, normal is due to the following reasons: first, is caused by refractive error, such as suffering from myopia, hyperopia, astigmatism, children will not see clearly, after blinking can temporarily improve vision. Second, is caused by conjunctivitis, when the conjunctiva tissue infection occurs, will cause mild eye foreign body sensation, need to blink to alleviate symptoms. Third, it is caused by dry eye disease, when the eye secretion is insufficient, the eye surface will lack tear film protection, need to blink frequently to alleviate the symptoms of dry eyes. Fourth, it is caused by trichiasis, when eyelashes prick to the cornea, it will damage the corneal epithelium, thus causing reflective blinking.