Efficacy of ultra-low-dose (0.1 mg) ranibizumab intravitreal injection for treatment of prethreshold type 1 retinopathy of prematurity: A case series.

Aim: To report the results of treatment of type 1 prethreshold retinopathy of prematurity using intravitreal injection of ultra-low dose of ranibizumab (0.1 mg in 0.01 mL).