Assessment of Changes in Cyliary Muscle in Patients with Hypermetropy Using Mathematical Modeling Methods

Purpose: To study the eye hydrodynamics indicators and eye morphometric parameters in presbyopic subjects with emmetropia and hyperopia under the usual professional visual load with using of progressive and monofocal spectacles correction. Material and methods: 49 subjects (98 eyes) of 4556 y.o., mean age (48 1.7) years, were examined. There were 20 men and 29 women. Emmetropia was present in 22 subjects (44 eyes), mild degree of hyperopia in 19 subjects (38 eyes) and moderate degree of hyperopia in 8 subjects (16 eyes). All subjects who were included in the study had not any eye diseases other than presbyopia and hyperopia. All persons were examined against the background of intense visual load at the end of the working day. First examination was performed without spectacles using, second one after prescribing and using of monofocal or progressive spectacles correction. The examination methods were represented by visometry, refractometry, pneumotonometry, computer tonography, ultrasound biometry, determination of accommodation amplitude using the Push up test, optical coherence tomography of the anterior segment of the eye. Results: The critic intensity of eye hydrodynamics processes, anterior chamber depth decreasing and the iridocorneal angle increasing were revealed under conditions of visual load at near distance in presbyopic patients with hyperopia and emmetropia without spectacles correction. Using of progressive spectacles correction led to significant decreasing of intraocular pressure (IOP) (p 0.001), increasing of aqeous humor outflow (p 0.001), anterior chamber depth decreasing (p 0.01 in emmetropia and p 0.001 in hyperopia) and iridocorneal angle increasing (p 0.001). Significant increasing of the accommodation amplitude was recorded with using of progressive correction in both hyperopic (p 0.001) and emmetropic subjects (p 0.05). Conclusion: The use of progressive glasses as a permanent correction has a positive effect on the state of eye hydrodynamics and morphometric parameters of the anterior chamber in emmetropic and hypermetropic patients with presbyopia. Lack of correction in persons of presbyopic age not only causes visual fatigue, but can lead to disruption of hydrodynamic balance and the development of glaucoma.

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Influence of progressive spectacles correction on the eye hydrodynamics indicators and ocular morphometric parameters in presbyopic persons

Gndoyan

Petraevsky

Kuznetsova

et al. 2023

Journal of Volgograd State Medical University

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Eyeglass correction: influence on the morphometric parameters of the anterior chamber and the eye hydrodynamics in presbyopes with hyperopia

Gndoyan

Petraevsky

Kuznetsova

2023

jour

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The work of accommodative apparatus has a regulatory effect on the hydrodynamics of eye and it is involved in ensuring the normal outflow of intraocular fluid (IOF). Age-related weakening of accommodation leads to a deterioration in the state of hydrodynamics, and especially significant shifts are expected in patients with axial hyperopia in the anatomical boundaries of “short” eye.Purpose. To evaluate the effect of correction with progressive lenses and monofocal ones on hydrodynamic indicators and certain morphometric parameters of the anterior chamber in presbyopic patients with hyperopia under conditions of long-term habitual professional eye strain.Material and methods. 25 subjects (50 eyes) of 44–55 y. o. (mean age 47 ± 1,6 years) were examined in January-July 2022. There were 8 males and 17 females with presbyopia and hyperopia. All patients were examined at the end of their working day: the first examination was performed in the initial state without correction, the second one − under using correction with monofocal lenses (control group) or progressive ones (main group). The examination methods included visometry, autorefractometry, pneumotonometry, ultrasound biometry, computerized tonography, determination of accommodation amplitude using the push-up test, optical coherence tomography of the eye anterior segment.Results. The critic tension of hydrodynamics, the decreasing of anterior chamber depth and iridocorneal angle width were revealed in presbyopic hyperopic patients under the conditions of eye strain at a near distance without correction with eyeglasses. Using of correction with progressive lenses led to significant increasing of the accommodation amplitude (p < 0,001), decreasing of IOP (p < 0,001), increasing of aqueous humor outflow (p < 0,001), deepening of the anterior chamber (p < 0,001) and increasing of the iridocorneal angle width (p < 0,001) compared to the initial state. No significant changes in these parameters were revealed in the users of monofocal lenses compared to the initial state.Conclusion. Using of progressive lenses as a permanent correction has a positive effect on ocular hydrodynamics and morphometric parameters of the anterior chamber in presbyopic hyperopes. Lack of correction in hyperopic patients of presbyopic age not only causes of eye fatigue but also can lead to disruption of hydrodynamic balance and development of glaucoma.

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Assessment of Changes in Cyliary Muscle in Patients with Hypermetropy Using Mathematical Modeling Methods

Cited by 2 publications

References 8 publications

Influence of progressive spectacles correction on the eye hydrodynamics indicators and ocular morphometric parameters in presbyopic persons

Influence of progressive spectacles correction on the eye hydrodynamics indicators and ocular morphometric parameters in presbyopic persons

Eyeglass correction: influence on the morphometric parameters of the anterior chamber and the eye hydrodynamics in presbyopes with hyperopia

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