The study enrolled 76 infants under 1 year of age (120 eyes) who underwent a total of 837 complex ophthalmological assessments, including ultrasound biometry and automatic refractometry. The assessment consisted of keratometry performed prior to cataract surgery, ultrasound biometry before and in different terms after the surgery, and evaluation of refraction in pseudophakic eyes. The power of intraocular lenses to be installed was determined using the principle of undercorrection. The follow-up periods ranged from 1 to 4 years. In 3.5-4.0 years after the surgery developmentally normal refraction was present in 58.5% of cases. According to analysis of refractive errors, the undercorrection prescribed to infants with preexisting II degree axial microphthalmia should be 2-3 diopters.