The development of a child's visual system begins in the first trimester of pregnancy, and refractogenesis continues after birth. Different age periods of development of the organ of vision have specific features and may be accompanied by risks affecting visual functions in the future. During the first year of a child's life, the morphological and functional development of the cranial nerves occurs, and the retina is formed. Newborns have hypermetropia; later, at 2 years, visual acuity increases to 0.3-0.5. After 3 years, the visual system experiences much stress associated with attending preschool and school. By the age of 7, emmetropia is normally formed. In school years, myopia (school myopia) is most often detected. Early diagnosis of refractive errors and timely correction in children prevents the following complications: strabismus, amblyopia, asthenopia, blepharitis, and conjunctivitis. An integrated approach to the follow-up and treatment of the child (the dosage of visual loads, eye gymnastics, adequate correction, and nutrition balance) will contribute to the normal development of the visual organ with the formation of high visual functions even with current high visual loads. It is recommended to take not individual vitamins but vitamin and mineral complexes, which can compensate for the deficiency of most vitamins by 20-30%. They should contain carotenoids (lutein, zeaxanthin), vitamins A, B group, C, E, and D, and potassium, zinc, and selenium. It is particularly relevant in children over 3 years of age due to the rapidly increasing intensity of visual load.