children who, as a result of disease or injury, have lost their vision completely or have retained only residual vision with an acuity of up to 0.04 diopters. If the loss of vision occurred after the child reaches the age of 3-4 years, then he can retain visual images of the world around him for a long time (sometimes throughout his life). In this regard, blind children have an advantage over those who are blind from birth, since with the help of visual memory they are able to actualize images of objects, in particular, by verbal description.