1. Brian G, Taylor H. Cataract blindness – challenges for the 21 century. Bulletin of the World Health Organization. 2001;79(3):249-56.
2. Cataracts, symptoms, causes, classification, diagnosis [Internet]. Vizio.com.ua. 2019 [cited 2019 Dec 11]. Available from: http://vizio.com.ua/knigi/52-oftal-mologija-bezkorovajna/348-katarakta-simptomi-prichini-klasifikatsiya-diagnostika.html
3. Trubilin V. Analysis of cataract progression in Russia taking into account the data of natural mortality of the population. Practical Medicine. 2016;1(2):70-3.
4. Neroev V. Clinical and social aspects of cataract treatment in Russia. Cataract and Refractive Surgery. 2016;16(1):4-14.
5. Ostrovskaya M. Frequency-contrast characteristics of the eye. Optical-Mechanical Industry. 1969;2:45-54.