(2020) Science and education, 3, 39-47. Odessa.

Oleksandr Plyska,
Doctor of Medical Sciences, professor,
MP Drahomanov National Pedagogical University,
9, Pirogova Str., Kyiv, Ukraine,
Larisa Kharchenko,
PhD student of the Department of Biology,
MP Drahomanov National Pedagogical University,
9, Pirogova Str., Kyiv, Ukraine,
Mykhailo Hrusha,
Candidate of Medical Sciences, associate professor,
Bogomolets National Medical University,
13, B. Shevchenko Str., Kyiv, Ukraine,
Irina Kondratok,
Master of the Department of Biology,
MP Drahomanov National Pedagogical University,
9, Pirogova Str., Kyiv, Ukraine,
Igor Shkrobanets,
Doctor of Medical Sciences, professor,
National Academy of Medical Sciences of Ukraine,
12, Herzen Str., Kyiv, Ukraine

CONTRAST SENSITIVITY AS A METHOD OF EARLY DETECTION OF REFRACTIVE
DISORDERS OF SCHOOLCHILDREN OF VARIOUS AGES

The aim of the study was to correlate the state of the refractive and adaptive systems and indicators of contrast sensitivity of schoolchildren of different age groups. The scheme of age periodization of a person, which takes into account anatomical, physiological and social factors, is used in the work. Visual acuity has been studied using GolovinSivtsev Tables. Contrast optotype tables have been used to determine contrast sensitivity. It is established that with age there is an increase in the frequency of clinically significant cases of myopia in both girls and boys. The frequency of its detection (33.74%; n = 251) in schoolchildren who participated in our study is almost twice as high as frequency of detection of hyperopia (17.20%; n = 128). The general trends in the deterioration of contrast sensitivity generally corresponded to changes in the state of the refractory apparatus in groups of female and male schoolchildren and were identical in nature. It has been found that the group of persons with index of contrast sensitivity in the range of 0–2 includes 73.04% of the total number of females and 72.0% of the total number of males belonging to different age groups in which the refractive error was found. Thus, there is a statistically significant increase in the frequency of clinically significant cases of deterioration of the refractive and adaptive system during the transition among female and male schoolchildren from younger to older age groups. At the same time with age there is an increase in the number of hyperopia in girls without such a trend in boys. A similar trend has been found in these age groups of schoolchildren in the analysis of the state of contrast sensitivity of vision using a table of contrast optotypes. The similarity of trends in the increase in the frequency of clinically significant cases of disorders of contrast sensitivity and refractive and adaptive system suggests that tables of contrast optotypes can be used as an early method of preclinical diagnosis of refractive errors in school-aged children. In this case, the study of contrast sensitivity of schoolchildren can be conducted by teachers, nurses during lessons on human anatomy and physiology, physics, ecology using a screening method. At the same time, the issues of application of this technique by teachers remain uncertain with which it is possible to easily and quickly investigate and assess the functional state of students’ visual analyzer.

 contrast sensitivity, visual analyzer, myopia, hypermetropia, disorders of refraction, prophylaxis of paropsiss in children.

1. Bondarenko, С. (2007). Trenuvannia zorovogo analizatora uchniv 11–12 rokiv pri roboti z kompyterom [Training of the visual analyzer of pupils of 11–12 years at work with the computer]. Naukovi zapysky – Scientific notes, 3, 80–83 [in Ukrainian].
2. Kostecka, А. О. (2014). Medykoorhanizatsiina tekhnolohiia optymizatsii monitorynhu porushen zoru u shkoliariv [Medical and organizational technology of optimization of monitoring of visual impairments in schoolchildren]. Extended abstract of candidate’s thesis. Kyiv: National Medical Academy of Postgraduate Education [in Ukrainian].
3. Orlova, S. N., Osipov, G. I. (2006). Korrektsiya zreniya [Vision correction]. Novosibirsk: Sibmedizdat NGMU [in Russian].
4. Petrіuk, S. Ye (2015). Vplyv patolohichnykh staniv ditei na navchalno-vykhovnyi protses u zahalnoosvitnikh navchalnykh zakladakh [Influence of pathological conditions of children on the educational process in secondary schools]. Visnyk Hlukhivskoho natsionalnoho pedahohichnoho universytetu imeni Oleksandra Dovzhenka. Seriia: Pedahohichni nauky – Bulletin of the Glukhiv National Pedagogical University named after Alexander Dovzhenko. Series: Pedagogical sciences, 27, 207–214 [in Ukrainian].
5. Rikov, S. O., & Savina, О. М. (2015). Problemy spadkovoi patolohii ochei u ditei i rol oftalmolohiv u yii vyrishenni [Problems of hereditary pathology of eyes in children and the role of ophthalmologists in its solution]. Tavricheskiy mediko-biologicheskiy vestnik – Tauride Medical and Biological Bulletin. 15, 4 (60), 328–331 [in Ukrainian].
6. Ferfilfayn, I. L. (1987). Blizorukost u detey i vzroslyih [Myopia in children and adults]. Kiev: Kniga plyus [in Ukrainian].
7. Kharchenko, L. B., Plyska, О. І., Grusha, М. М., & Shkrobanets, І. D. (2020). Vyznachennia hostroty zoru ta kontrastnoi chutlyvosti v riznykh vikovykh hruppakh shkoliariv [Determination of visual acuity and contrast sensitivity in different age groups of students]. Ukrainskyi zhurnal medytsyny, biolohii ta sportu – Ukrainian Journal of Medicine, Biology and Sports. 5, 1 (23), 230–235 [in Ukrainian].
8. Bagdonavicius, V. В., & Nikulin, M. S. (2011). Chi-squared goodness-of-fit test for right censored data. International Journal of Applied Mathematics and Statistics, 24, 30–50 [in English].
9. Elliot, D. B. (2013). Clinical Procedures in Primary Eye Care. 4th edition. Saunders Ltd [in English].
10. Holden, B. A., Fricke, T. R., Wilson, D. A., et al. (2016). Global Prevalence of Myopia and High Myopia and Temporal Trends from 2000 through 2050. Ophtalmol, 123 (5), 1036–1042 [in English].
11. Mourits, Daphne L., Hartong, Dyonne T., van Beek, Johannes, H. M. (2017). A novel method to measure artificial eye motility. Ophthalmic Plastic & Reconstructive Surgery, 33 (6), 413–418 [in English].
12. Nikulin, M. S. (1973). Chi-squared test for normality. Proceedings of the International Vilnius Conference on Probability Theory and Mathematical Statistics, 2, 119–122 [in English].
13. Villarreal, M. G., Ohlsson, J., Abrahamsson, M., & Sjstrand, J. (2000). Myopisation: The refractive tendency in teenagers. Prevalence of myopia among young teenagers in Sweden. Acta Ophthalmol. Scandinavica, 78, 177–181 [in English].