Phacoemulsification in patients after previous implantation of a complete intrastromal ring into a corneal transplant

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BACKGROUND: The MyoRing implantation into a corneal transplant can significantly compensate for irregular post-keratoplastic astigmatism. However, the cataract that occurs in this category of patients and the lack of information in the literature on its phacoemulsification and the calculation of a toric intraocular lens (tIOL) power in them determines the relevance of our study.

AIM: The aim of the study is to conduct a clinical and functional analysis of phacoemulsification in patients after previously performed implantation of a MyoRing into a corneal transplant.

MATERIALS AND METHODS: We operated on 21 patients (21 eyes) who had previously undergone the MyoRing implantation into a corneal transplant. According to keratotopography, all patients were diagnosed with a regular form of corneal astigmatism. All patients underwent phacoemulsification with tIOL implantation. When calculating the tIOL power, its diopter value was corrected depending on the average value of the corneal transplant keratometry according to the keratotopogram data. The observation period duration was 6 months.

RESULTS: One month after the procedure, there was an increase in uncorrected visual acuity by 0.2 ± 0.9 LogMAR, best corrected visual acuity by 0.3 ± 1.0 LogMAR, the spherical component of refraction — up to –0.4 ± 0.44 D, the cylindrical component of refraction — up to –0.62 ± 0.18 D, all of which did not change later on.

CONCLUSIONS: Phacoemulsification with tIOL implantation, with its power calculated taking into account an additional correction for its diopter value, is an effective, predictable and safe method of treating patients after previously performed MyoRing implantation into a penetrating corneal transplant.

作者简介

Maksim Sinitsyn

S.N. Fyodorov Eye Microsurgery Federal State Institution, the Cheboksary branch

编辑信件的主要联系方式.
Email: mntksinicin@mail.ru
ORCID iD: 0000-0002-7285-1782

Cand. Sci. (Med.), MD of Highest Qualification, Head of the Children’s Department

俄罗斯联邦, 10, Traktorostroitelei av., Cheboksary, 428028

Nadezhda Pozdeyeva

S.N. Fyodorov Eye Microsurgery Federal State Institution, the Cheboksary branch

Email: npozdeeva@mail.ru
ORCID iD: 0000-0003-3637-3645

Dr. Sci. (Med.), Assistant Professor, MD of Highest Qualification, Director of Branch

俄罗斯联邦, 10, Traktorostroitelei av., Cheboksary, 428028

参考

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  5. Patent RUS № 2737221/ 26.11.2020. Byul. № 33. Pozdeeva NA, Kulikova IL, Sinitsyn MV, et al. Sposob korrektsii indutsirovannogo postkeratoplasticheskogo astigmatizma i miopii vysokoi stepeni. Available from: https://patenton.ru/patent/RU2737221C1 (In Russ.)
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2. Figure. Photo of the patient’s eye on the next day after phacoemulsification with toric IOL implantation after previously performed MyoRing implantation into a penetrating corneal graft transplant using a femtosecond laser. The centered IOL is visualized (the toric axis of the IOL is marked with a red arrow, the strong meridian of the penetrating corneal transplant is marked with a green arrow)

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