Potential of two-channel rheoophthalmography in the assessment of ocular blood flow in children and adolescents with myopia

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Abstract

Aim. This study aimed to investigate the diagnostic potential of two-channel rheoophthalmography (ROG) in the assessment of ocular blood flow disorders in children and adolescents with myopia.

Material and methods. The method developed allowed one of the ROG channels to probe deep into the posterior pole of the eye and was designed to assess blood supply in the eye pole. Furthermore, the other channel was used to analyze blood flow in the temporal arteries — in the area of the ophthalmic and internal carotid arteries. Both signals were recorded simultaneously, which allows measuring of the blood flow distribution between these vascular regions. To assess the diagnostic potential of the method, two-channel rheoophthalmography signals were recorded and analyzed. The signals were obtained from 24 eyes (13 patients): 13 eyes (7 patients; median age, 14.1 years) with low myopia (−0.5 to −3.0 D) and 11 eyes (6 patients; median age, 23.7 years) with emmetropia (control group).

Results. In myopia patients, a relative increase of 4.1% in the ocular channel rheographic index (RI) was detected, whereas in the temporal channel, the RI increased simultaneously by 4.97%. The basic impedance (BI) indicator, obtained using the same method, increased by 22.4% in the ocular channel and by 29.5% in the temporal channel.

Conclusion. The simultaneous increase in BI in the temporal region and posterior eye pole area and proportional increase in pulse blood filling (RI) indicate that a change in blood supply in the posterior eye pole could be observed even in low myopia patients.

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About the authors

Elena N. Iomdina

Helmholtz National Medical Research Center of Eye Diseases

Author for correspondence.
Email: iomdina@mail.ru
ORCID iD: 0000-0001-8143-3606

Dr of Biol. Sci, professor

Russian Federation, Moscow

Nina Yu. Kushnarevich

Helmholtz National Medical Research Center of Eye Diseases

Email: nk112@mail.ru

MD, PhD

Russian Federation, Moscow

Tatjana Yu. Larina

Helmholtz National Medical Research Center of Eye Diseases

Email: tlpenguin@mail.ru

MD, PhD

Russian Federation, Moscow

Elena P. Tarutta

Helmholtz National Medical Research Center of Eye Diseases

Email: elenatarutta@mail.ru
ORCID iD: 0000-0001-8143-3606

Dr of Med. Sci, professor

Russian Federation, Moscow

Petr V. Luzhnov

Bauman Moscow State Technical University

Email: peterl@hotmail.ru
ORCID iD: 0000-0003-1111-7063

PhD

Russian Federation, Moscow

Anna A. Kiseleva

Bauman Moscow State Technical University

Email: kiseleva.anna.a94@gmail.com

аспирант ФГБОУ ВО «Московский государственный технический университет им. Н.Э. Баумана (национальный исследовательский университет)»

Russian Federation, Moscow

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Supplementary files

Supplementary Files
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2. Fig. 1. Positioning of tetrapolar electrode system for two-channel rheoophthalmography.

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3. Fig. 2. The example of simultaneous signal of pulse blood filling registration using multichannel ROG: A – of emmetropic patient (control group) and Б – of low myopic patient. Red curve — the signal registered using temporal electrode system (ophthalmic and carotid arteries area), black curve — the signal registered by probing eye posterior pole.

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