The purpose of this study is to evaluate the change of the optic nerve sheath diameter according to the change of the neck position in pediatric patients undergoing palatoplasty.

Palatoplaty is performed under neck extension in patients with cleft palate. The purpose of this study is to evaluate the effect of neck extension on the ultrasonographic optic nerve sheath diameter during palatoplasty.

Inclusion Criteria:

• Patients who have undergone a palatoplasty with cleft palate and who are 6 months or older and under 24 months
• Patients who agree to voluntarily participate in this study
• Patients with ASA class 1-2

Exclusion Criteria:

• History of diagnosis of neurologic or ophthalmic disease
• History of neurosurgery or ophthalmic surgery
• Patients who refused to participate in clinical studies

Patients who have undergone a palatoplasty with cleft palate and who are 6 months or older and under 24 months