ALTERED VISUAL FUNCTION AND ITS RECOVERY IN TEENAGERS WITH EMETROPICAL REFRACTION UNDER VISUAL COMPUTER LOAD
S.N. Vadzuk1, N.Y. Ulianutska2, N.O. Byelikova2 S.Y. Indyka2, Y.S. Vadzuk1, M.O. Sopiga1
- Ivan Horbachevsky Ternopil State Medical University, Ukraine
- Lesya Ukrainka Eastern European National University in Volyn, Ukraine
60 healthy students of 14-16 years (120 eyes) with emetropical
refraction without ophthalmological, medical and mental
deviations were examined. Visual acuity, its threshold value
(separation and perception minima) and contrast sensation
were studied using special techniques. Our study shows a
decrease in the visual acuity after one-hour continuous visual
load on the computer monitor. The 15-minute passive
rest is revealed to have no essential effect on this indicator.
It should be noted that recovery exercises for 15 minutes
after one-hour loading increased the visual acuity almost
to the initial level. A significant reduction in the separation
and perception of minima rates was also determined after
visual computer load. Short passive rest has not affected the
value of the first indicator and to some extent improved the
value of the second one. However, a series of restorative
exercises led to a significant improvement in the separation
minima of both eyes and perception minima almost to the
original state. The obtained results show a deterioration
of the contrast sensitivity after visual load and no change
of it after a 15-minute passive rest. However, a significant
improvement of the contrast sensitivity was observed after
exercises. Thus, the indicators of the visual functions: visual
acuity, its thresholds components (separation and perception
minima) and contrast sensitivity in teenagers decrease
under the influence of operating PC during 45 minutes,
but the 15-minute set of recovery exercises of the author’s
program “Saving and Eyesight Recovery” gets them closer
to the original level.
impact of computer; teenagers; visual acuity; separation and perception minima, contrast sensitivity
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