In most cases, it is normal for infants not to blink, but if it persists for an unusually long period of time, it is necessary to consult a doctor to rule out problems such as visual impairment and mental retardation. Infants are curious, some external stimuli can attract their attention for a long time, at the same time, the eye secretion function is relatively good, it is not easy to feel the dryness of the conjunctiva, etc., which will lead to infants do not like to blink. This is mostly normal and not a cause for concern. However, if the infant does not blink for an unusually long period of time, it is necessary to go to the hospital to rule out whether there are any visual abnormalities, or if the visual acuity is weak, the external stimulation to the eyes is weakened, which leads to the infant’s lack of blinking. Neurological developmental assessment should also be performed to rule out neurological developmental abnormalities. Mentally retarded children can also blink inappropriately due to their lack of response to the outside world.