Small blepharospasm syndrome is a rare congenital disorder in which the main symptoms are ptosis, narrow eyelid fissures, inverted medial canthus, and widening of the distance between the inner corners of the eyes. Small blepharospasm syndrome is a congenital eyelid abnormality that is mostly associated with family inheritance. The main clinical manifestations of microblepharospasm syndrome are drooping upper eyelid, narrow eyelid fissure, inverted medial canthus, widening of the distance between the inner corners of the eyes, etc. If the patient is a female with type I, it may also lead to premature ovarian failure and infertility. Currently, the main treatment for small blepharospasm syndrome is surgery, such as medial canthoplasty, which corrects inverted medial canthus and widening of the distance between the inner corners of the eyes, and ptosis correction, which corrects ptosis and reduces the impact on vision development. Children with eyelid anomalies after birth or early in their development should be seen promptly to avoid delays that could have a serious impact on the patient’s vision development as well as mental health.