The purpose of this study is to measurement of optic nerve sheath diameter in children without intracranial pressure increase and determine the average optic nerve sheath diameters for healthy children. For that, between 4 and 18 years old children will be selected. After taking of measurements, following parameters will be taken into account and measurements will be classified with those parameters .~Age~Gender~Length (cm)~Weight (kg)~Waist Circumference (cm)~Body Mass Index
The purpose of this study is to measurement of optic nerve sheath diameter in children without intracranial pressure increase and determine the average optic nerve sheath diameters for healthy children.