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

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

doi:https://doi.org/10.17116/oftalma202213804174

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

Read: 1291 times

Download PDF (RU)

Contact the author

Table of contents

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 2026 Вестник офтальмологии (Russian Annals of Ophthalmology)

Использование инфографики авторами научных работ

Close metadata

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

Close metadata

References:

Moussa S, Dietrich M, Lenzhofer M, Ruckhofer J, Reitsameret HA. Femtosecond laser in refractive corneal surgery. J Photochem Photobiol Sci. 2019; 18(7):1669-1674. https://doi.org/10.1039/c9pp00039a
Shishkin SA, Dutchin IV, Sorokin EL. Study of the incidence of thin cornea among patients with varying degrees of myopia. Sovremennye tekhnologii v oftal’mologii. 2018;(2):70-71. (In Russ.).
Daxer A. Corneal intrastromal implantation surgery for the treatment of moderate and high myopia. J Cataract Refract Surg. 2008;34(2):194-198. https://doi.org/10.1016/j.jcrs.2007.10.011
Rattan SA. Continuous intracorneal ring implantation for treatment of myopic astigmatism. Int Med Case Rep J. 2018;11:217-220. https://doi.org/10.2147/IMCRJ.S173167
Pashtaev NP, Pozdeeva NA, Sinitsyn MV, Shlenskaya OV. Correction of high myopia in a patient with thin cornea using MyoRing implantation method according optimized technology (clinical case). Kataraktal’naya i refraktsionnaya khirurgiya. 2013;13(4):25-28. (In Russ.).
Alio JL, Pinero DP, Daxer A. Clinical outcomes after complete ring implantation in corneal ectasia sing the femtosecond technology: A pilot study. Ophthalmology. 2011;118(7):1282-1290. https://doi.org/10.1016/j.ophtha.2010.12.012
Daxer A. MyoRing treatment of myopia. J Optom. 2016;10(3):194-198. https://doi.org/10.1016/j.optom.2016.06.003
Reinstein DZ, Waring GO. Graphic reporting of outcomes of refractive surgery. J Refract Surg. 2009;25(11):975-978. https://doi.org/10.3928/1081597X-20091016-01
Barsam A, Allan BD. Excimer laser refractive surgery versus phakic intraocular lenses for the correction of moderate to high myopia. Cochrane Database Syst Rev. 2010;12(5):CD007679. https://doi.org/10.1002/14651858.CD007679.pub2
Alió JL, Soria F, Abbouda A, Peña-García P. Laser in situ keratomileusis for –6.00 to –18.00 diopters of myopia and up to –5.00 diopters of astigmatism: 15-year follow-up. J Cataract Refrac Surg. 2015;41(1):33-40. https://doi.org/10.1016/j.jcrs.2014.08.029
Pallikaris IG, Kymionis GD, Astyrakakis NI. Corneal ectasia induced by laser in situ keratomileusis. J Cataract Refract Surg. 2001;27(11):1796-1802. https://doi.org/10.1016/s0886-3350(01)01090-2
Guell JL, Rodriguesz-Arenas AF, Gris O, Malecaze F, Velasco F. Phacoemulsification of crystalline lens and implantation of intraocular lens for the correction of moderate and high myopia: 4 years follow-up. J Cataract Refract Surg. 2003;29(1):34-38. https://doi.org/10.1016/s0886-3350(02)01944-2
Fernandez-Vega L, Alfenso JF, Villacamp T. Clear lens extraction for the correction of high myopia. Ophthalmology. 2003;110(12):2349-2354. https://doi.org/10.1016/S0161-6420(03)00794-2
Kohnen T, Knorz MC, Cochener B, Gerl RH, Arné JL, Colin J, Alió JL, Bellucci R, Marinho A. AcrySof phakic angle-supported intraocular lens for the correction of moderate-to-high myopia: one-year results of a multicenter European study. Ophthalmology. 2009;116(7):1314-1321. https://doi.org/10.1016/j.ophtha.2009.01.041
Toso A, Morselli S. Visual and aberrometric outcomes in eyes with an angle-supported phakic intraocular lens. J Cataract Refract Surg. 2012;38(9): 1590-1594. https://doi.org/10.1016/j.jcrs.2012.04.038
Dilek Y, Ufuk Ü, Alper A, Yusuf Y, Burçin Kepez Y. Early Results with a New Posterior Chamber Phakic Intraocular Lens in Patients with High Myopia. J Ophthalmology. 2018;2018:1329874. https://doi.org/10.1155/2018/1329874
Reinstein DZ, Archer TJ, JB Randleman JB. Mathematical model to compare the relative tensile strength of the cornea after PRK, LASIK and small incision lenticule extraction. J Refract Surg. 2013;29(7):454-460. https://doi.org/10.3928/1081597X-20130617-03
Daxer A. Biomechanics of the cornea. Int J Kerat Ectatic Cor Dis. 2014; 3(2):57-62. https://doi.org/10.5005/jp-journals-10025-1080
Bikbov MM, Usubov EL, Bikbova GM. Combined treatment of keratoconus by implantation of intrastromal MyoRing rings in combination with corneal collagen crosslinking. In: Fedorov readings — 2014: Collection of scientific articles. M.: Oftal’mologiya; 2014:25. (In Russ.).
Studený P, Křížová D, Straňák Z, Kuchynka P. Clinical results after continuous corneal ring (myoring) implantation in keratoconus patients. Cesk Slov Oftalmol. 2015;71(1):87-90.