This study evaluates the effects of birth weight (BW) on ocular anterior segment parameters in preschool children using the Galilei Dual-Sheimpflug Analyzer (GD-SA). Children were measured by GD-SA and relationships between all anterior segment parameters obtained by this device and birth weight were analyzed.

Preschoolers, who were born heavier, had thicker cornea and lens, longer axial length, and flatter corneal curve. The thicknesses and axial curves of central cornea within 7mm may be particularly associated with BW.

Inclusion Criteria:

• ages 3- 6 years;
• birth weight >2,500 g;
• gestational age (i.e., the period of time between the first day of the mother's last menstrual period and birth) >37 weeks;
• visual acuity >0.8 (in decimals);
• no history of any systemic or ocular diseases;
• no history of previous ocular surgeries;
• no retinopathy of prematurity;
• no current medications; and
• no retinal or optic disc abnormalities on fundoscopy.

Exclusion Criteria:

• ages <3 >6 years;
• birth weight <2,500 g;
• gestational age (i.e., the period of time between the first day of the mother's last menstrual period and birth) <37 weeks;
• visual acuity <0.8 (in decimals);
• history of any systemic or ocular diseases;
• history of previous ocular surgeries;
• retinopathy of prematurity;
• current medications; and
• retinal or optic disc abnormalities on fundoscopy.

Healthy children aged between 3-6- preschoolers- born at term and have birth weight heavier than 2500g