Effeciency contact correction of hypermetropia in children of school-age in the distant term of caution

Abstract

Objective – to study the affectiveness of contact correction of hypermetropia in school-age children in the long of observetion.Materials and methods. The study included 56 children (112 eyes) aged 6 to 16 years with hyperopic refraction and astigmatism, who used soft silicone hydrogel contact lenses to correct ametropia. In these patients, a study of visual acuity, objective and subjective clinical refraction, axial length of the eye, corneal thickness and diameter, keratometry, as well as phorometric data (accommodation, vergence, dispar areas of the oculomotor system and their interaction) in early and late observation periods. Results. When using contact correction in school-age children with hyperopia and hyperopic astigmatism, statistically significant after 3 years of observation there was an increase in uncorrected visual acuity by 85 % (t = 7.9; p <0.01), corrected visual acuity by 7 % (t = 7.4; p <0.01), keratometry in the weak meridian by 1 % (t = 6.1; p <0.01), by 1 % (t = 8.9; p <0.01) in the strong meridian, the thickness of the cornea in the central zone by 4 % (t = 4.6; p <0.01), as well as a decrease in the sphere equivalent by 38 % (t = 3,1; p <0,01), the amplitude of accommodation by 20 % (t = 5.8; p <0.01), the negative part of the relative accommodation by 20 % (t = 3.0; p <0.01), the positive part of the relative accommodation by 18 % (t = 3.5; p <0.01), excess accommodation response by 64 % (t = 7.2; p <0.01), foria by 33 % (t = 4.4; p <0.01), foria by close by 22 % (t = 2.8; p <0.01), the ratio of accommodation convergence to accommodation by 18 % (t = 3.1; p <0.01).Conclusions. As a result of 3-year observation of school-age children with hypermetropia in which correction was used by various optical methods, it was established that correction with soft silicone-hydrogel aspheric contact lenses is the most effective way to control this ametropia, which is confirmed by an increase in visual acuity, spheroequivalent indicators, as well as changes in the front surface of the cornea: an increase in thickness in the central zone, and an improvement in keratometry, as well as a positive effect on accommodation ability, muscle balance and stereoscopic vision.