Widening of the orbital distance is a condition in which the bony distance between the medial walls of both orbits is excessively widened. This condition is not a craniofacial syndrome, but rather part of a sequence of congenital malformations or a syndrome. The clinical manifestation is a widening of the interorbital distance. Nasal deformities have various manifestations in patients with widening of the interorbital distance, such as a short broad nose, with a broad flat dorsum, a depressed central nasal dorsum, and a short nasal minors; a split nose, often with a double septum and a double nasal tip; and a pair of split noses caused by a parafacial median cleft that is often asymmetrical, with one half being nearly normal and the other abnormally short; a long nose, most often seen in patients with craniofacial clefts and meningeal bulges; a nasal agenesis, with a complete nasal dorsum, nasal tip, and nasal wing Absence, where the nostrils communicate directly with the nasopharynx. Due to the extrusion of meningeal bulging tissue, the tear ducts are sometimes blocked and chronic inflammatory manifestations. 1, craniofacial median cleft; 2, craniofacial dysplasia; 3, frontal nasal and frontal sieve meningeal bulge; 4, frontal nasal bone hypoplasia; 5, premature closure of cranial suture, such as Crouzon, Apert and Cohen syndrome, etc. The diagnosis of orbital distance widening is based on the measurement of interorbital distance (IOD), which varies by race, age, and gender. Generally, IOD is constant at the age of 18 for women and 21 for men. Westerners use IOD as a criterion to classify orbital distance widening into three degrees: mild (30-34mm), moderate (35-39mm), and severe (≥40mm). The diagnostic criteria of orbital spacing widening suitable for Chinese people are degree I 32-35mm, degree II 36-39mm, degree III ≥40mm. Timing of treatment At present, most people prefer early surgery, but the earliest should not be less than 2 years old, because the bone quality is thin at this time, and the bone is not firmly fixed after osteotomy and displacement, and the skull cannot be split into two layers. Premature surgery may damage the dental embryo and may affect the development of craniofacial bone. Most people advocate surgery at the age of 5-6 years, when the bone tissue is thin and soft and the osteotomy is convenient. The earlier the surgery is performed, the more it will help the child’s psychological growth. The specific surgery time should be selected according to the specific situation of the patient, such as the rapid development of the disease, or when there is corneal exposure, etc., should be operated as early as possible. In patients with mild deformity, periorbital osteotomy is generally not needed, but can be performed to improve the appearance by inner canthoplasty and correction of nasal deformity; in patients with moderate deformity, periorbital osteotomy can be performed by combined intracranial and extracranial pathways, such as internal displacement of the lateral wall of the orbit or U-shaped osteotomy, and inner canthoplasty; in patients with severe deformity, periorbital osteotomy should be performed by combined intracranial and extracranial pathways.