Morphological changes of the vision organ among winterers in Ukrainian Antarctic station "Academician Vernadskiĭ"
Varyvonchyk DV2, Rykov SO2, Saliukov AO1, Mishenin AB2, Pyshnov HIu2, Moĭseienko IeV3
- Institute of medicinal work NAMS of Ukraine, Kyiv, Ukraine;
- P.L. Shupyk National Medical Aademy of Post-Diploma Edication, Kyiv, Ukraine;
- National Antarctic Science Center, MPH of Ukraine, Ukraine
The study revealed that the Antarctic territory in the area of
the Ukrainian Antarctic station “Academician Vernadsky” can
be referred to the zone of the «super high» risk in developing
ophthalmological pathology, caused by ultraviolet radiation.
The results of the comprehensive dynamic study of 24
winterers of the XVI and XVII Ukrainian Antarctic expeditions
(2011–2013) showed the developing of specific changes
in the organ of vision under the exposure to the excessive
natural ultraviolet radiation (UVR), such as parenchymatous-
endothelial keratopathy, nuclear-posteriorcapsular phacopathy,
maculopathy. Morphological changes were recorded using the
cornea densitometry method: a decrease of the central cornea
thickness by 14,3%, a decrease of the density and the number
of endothelial cells of hexagonal type by 10,1% and 16,6 %,
respectively (Р<0,05). Using densitometry method, we detected
morphological changes in the lens. SpeciYcally, we found an
increase of the optic lens density: in median zone by 10,1 %, in
maximal zone by 21,6 %, in posterior part by 13,1 %, Р<0,05.
The results of densitometry recordings point to the development
of local opacity in the posterior lens parts (in the nucleus and
in the capsule). The data of the computed quantitative macula
perimetry showed a signiYcant decrease of light sensitivity of
retina conicalis cells by 6 times (Р<0,05). The morphological
signs of the endured acute solar retinopathy were found in more
than 50% winterers. The revealed pathological changes can be
considered as pre-, subclinical manifestations of the cornea
dystrophy, cataracts and maculodystrophy, caused by speciYc
action of the natural UVR, thus demanding the elaboration of
the combined preventive measures.
natural ultraviolet radiation, ophthalmologic pathology, Antarctic winterers
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