Long-term clinical and functional outcomes of high myopia correction by femtosecond laser-assisted implantation of an intrastromal ring

Kulikova I.L.

Cheboksary branch of S.N. Fyodorov National Medical Research Center «MNTK «Eye Microsurgery»

Pozdeyeva N.A.

Cheboksary Branch of S.N. Fedorov National Medical Research Center «MNTK «Eye Microsurgery»;
Postgraduate Doctors’ Training Institute

Terentyeva A.E.

Cheboksary branch of S.N. Fedorov National Medical Research Center «MNTK «Eye Microsurgery»

Sinitsyn M.V.

National Medical Research Center for Phthisiopulmonology and Infectious Diseases

Long-term clinical and functional outcomes of high myopia correction by femtosecond laser-assisted implantation of an intrastromal ring

Authors:

Kulikova I.L., Pozdeyeva N.A., Terentyeva A.E., Sinitsyn M.V.

More about the authors

Journal: Russian Annals of Ophthalmology. 2022;138(4): 74‑80

DOI: 10.17116/oftalma202213804174

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To cite this article:

Kulikova IL, Pozdeyeva NA, Terentyeva AE, Sinitsyn MV. Long-term clinical and functional outcomes of high myopia correction by femtosecond laser-assisted implantation of an intrastromal ring. Russian Annals of Ophthalmology. 2022;138(4):74‑80. (In Russ.)
https://doi.org/10.17116/oftalma202213804174

Подписка 2025 (Russian Annals of Ophthalmology)

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OBJECTIVE

To analyze remote clinical and functional outcomes of correcting high myopia in patients with thin cornea by the method of femtosecond laser-assisted implantation of intracorneal implant MyoRing.

MATERIAL AND METHODS

The study included 22 patients (22 eyes; the mean age of study patients was 30.2±5.37 years). Mean spherical equivalent (SE) of refraction was –11.52±1.96 D, cylindrical component (cyl) of refraction was –2.04±1.64 D, minimal pachymetry index in the center was 491.6±20 µm, corneal hysteresis (CH) amounted to 8.6±1.19 mm Hg. The average pupil diameter in mesopic conditions was 5.6±0.23 mm. All patients had a history of mild amblyopia. The follow-up period lasted 2 years.

RESULTS

Two years after the surgery uncorrected visual acuity was 0.6±1.22, corrected visual acuity 0.7±0.20. Mean spherical equivalent (SE) of refraction was 0.61±1.43 D, cylindrical component of refraction was –0.13±0.5 D. Predictability of SE within ±0.5 D was recorded in 84% of cases, ±1.0 — also in 84% of cases. Index of safety was 1.16, index of efficacy — 1.0. CH was 9.5±0.03 mm Hg. Mean pachymetry at the center did not change statistically significantly after the surgery in comparison to the initial data (p=1.00).

CONCLUSION

MyoRing implantation is an effective and safe method, which ensures correction of the spherical component of refraction, as well as correction of astigmatism, improvement of biomechanical properties of the cornea, and an increase in corneal hysteresis (p=0.01).

Keywords:

high myopia

thin cornea

MyoRing

femtosecond laser

corneal hysteresis

Authors:

Kulikova I.L.

Cheboksary branch of S.N. Fyodorov National Medical Research Center «MNTK «Eye Microsurgery»

Pozdeyeva N.A.

Cheboksary Branch of S.N. Fedorov National Medical Research Center «MNTK «Eye Microsurgery»;
Postgraduate Doctors’ Training Institute

Terentyeva A.E.

Cheboksary branch of S.N. Fedorov National Medical Research Center «MNTK «Eye Microsurgery»

Sinitsyn M.V.

National Medical Research Center for Phthisiopulmonology and Infectious Diseases

Received:

10.02.2021

Accepted:

22.03.2022

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