Indicators of Central Hemodynamics in Acquired Myopia

Abstract

Introduction. The presented study focuses on investigating the impact of acquired myopia on human central hemodynamics. Myopia, or nearsightedness, ranks as one of the most common ophthalmological disorders globally and in Ukraine, manifesting either congenitally or acquired over a lifetime. Ophthalmology specialists note a rapid increase in myopia cases across all age groups, with its prevalence posing a significant threat to vision and overall health. Viewing myopia as an adaptive response to a substantial visual strain one can presume that this adaptation might not be localized but generalized. The objective of the study is to examine the characteristics of central hemodynamics in individuals with acquired myopia. Materials and methods. The research was conducted on volunteers, 81 individuals aged 18 – 35, who were divided into a control group of 40 persons and a study group of 41 individuals diagnosed as having myopia. The diagnosis was established by specialists in Dnipro. The study was carried out at the General Practice Family Medicine Clinic No. 7 in Dnipro during 2022-2023. Central hemodynamic status was characterized by the following indicators: heart rate, systolic and diastolic blood pressure, pulse pressure, systolic blood volume, and minute blood volume. The Kerdo’s vegetative index was also calculated. Results. The study revealed that acquired myopia was accompanied by an increase in the absolute values of heart rate, systolic blood pressure, diastolic blood pressure, pulse pressure, and minute blood volume compared to the control group of volunteers. It is noteworthy that the systolic blood volume in the context of acquired myopia was lower than in the control group. The Kerdo’s index was higher in the group with acquired myopia compared to the control group. The obtained results indicate a certain dependency between central hemodynamics indicators, the Kerdo’s index value, and acquired myopia, which is an adaptive reaction of the visual system to significant loads in the modern information-cybernetic society. Changes in central hemodynamics indicators in individuals with myopia may reflect certain adaptive reactions of the cardiovascular system to this eye refraction disorder.