What's with the blinking eyes?

Eyes are always blinking due to the following reasons: 1, due to eyelid entropion and trichiasis caused by eyelashes directly in contact with the cornea, in the eye rotation and blinking movement, eyelashes and corneal epithelium friction, so damage to the cornea, so that the patient feels that the eyes show foreign body sensation, so frequent blinking. 2. Due to keratoconjunctival dryness, when the eye surface lacks complete tear film protection, the eyes will feel dry, tingling, foreign body sensation, and the residual tears can be redistributed on the eye surface after blinking movement, thus alleviating the above symptoms, so the patient will show frequent blinking symptoms. 3, caused by tic disorder, normally seen in children and adolescents patients, eye examination, no obvious abnormal performance led to blinking, at the same time the patient will also show mouth twitching, and self-talk and other conditions, is caused by psychological diseases.