Screening for keratoconus early signs in planning keratorefractive surgery

M.-A. B. Ergashev; N. A. Pozdeeva; N. A. Maslova; S. M. Pikusova

doi:10.33791/2222-4408-2022-4-7-12

Screening for keratoconus early signs in planning keratorefractive surgery

M.-A. B. Ergashev, N. A. Pozdeeva, N. A. Maslova, S. M. Pikusova

https://doi.org/10.33791/2222-4408-2022-4-7-12

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Abstract

Clinical relevance. Keratoconus (KC) without clinical manifestations (subclinical stage) occurs in patients with ametropia periodically. Before refractive surgery, in time detection of early signs of this pathology is important as KC is a contraindication to its application.

Purpose: to analyze and compare informative value of the Pentacam HR projection-based tomograph, the TOMEY TMS-4 reflecting-based corneal topographer and the CASIA-2 optical coherent tomograph to identify early signs of KC before refractive laser surgery.

Materials and methods. A prospective study of cornea morphometric parameters in 81 patients (162 eyes) who applied to the Cheboksary branch of the Intersectoral Scientific and Technical Complex “Eye Microsurgery” was performed in order to resolve the issue of refractive surgery possibility with various types of ametropia during the second half of 2020 year. In addition to the generally accepted ones, examinations were carried out using the above-mentioned devices. Age of the patients ranged from 18 to 38 years old (on average 25 ± 5). The sample consisted of 33 (40.81%) men and 48 (59.19%) women.

Results. According to the TOMEY TMS-4 reflecting-based corneal topographer, suspicion of KC was detected in 6 patients (11 eyes) that amounted to 6.79% of all examined patients. The Pentacam HR projection-based tomograph revealed suspicion of KC in 9 patients (18 eyes or 11.11% of all examined patients). While using the CASIA-2 optical coherent tomograph, suspicion of KC was detected by ESI (Ectasia Screening Index) Anterior in 6 patients (11 eyes), and by ESI Posterior in 7 patients (14 eyes) that amounted to 6.79 and 8.64% of all examined patients respectively.

Conclusion. The data obtained during the study showed the greatest informativity and efficiency of the Pentacam tomograph in screening for early signs of KC.

Keywords

keratoconus, keratotopograph, Belin-Ambrosio ectasia analysis

About the Authors

M.-A. B. Ergashev

Institute for the Postgraduate Education of Doctors
Russian Federation

Mukhammad-Ali B. Ergashev, Resident

27, Mikhail Sespel Str., Cheboksary, 428018

N. A. Pozdeeva

Institute for the Postgraduate Education of Doctors; Cheboksary branch of the S. Fyodorov Eye Microsurgery Federal State Institution
Russian Federation

Nadezhda A. Pozdeeva, Dr. Sci. (Med.), Professor of the Institute for the Postgraduate Education of Doctors; Director of the Cheboksary branch of the the S. Fyodorov Eye Microsurgery Federal State Institution

27, Mikhail Sespel Str., Cheboksary, 428018

10, Traktorostroiteley Ave., Cheboksary, 428028

N. A. Maslova

Cheboksary branch of the S. Fyodorov Eye Microsurgery Federal State Institution
Russian Federation

Nadezhda A. Maslova, Cand. Sci. (Med.), Ophthalmologist of the Highest qualiﬁcation Category, Head of the First Laser Department (Bottom)

10, Traktorostroiteley Ave., Cheboksary, 428028

S. M. Pikusova

Cheboksary branch of the S. Fyodorov Eye Microsurgery Federal State Institution
Russian Federation

Svetlana M. Pikusova, Ophthalmologist of the Laser Refractive Department and Junior Researcher

10, Traktorostroiteley Ave., Cheboksary, 428028

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Review

For citations:

Ergashev M.B., Pozdeeva N.A., Maslova N.A., Pikusova S.M. Screening for keratoconus early signs in planning keratorefractive surgery. The EYE GLAZ. 2022;24(4):7-12. (In Russ.) https://doi.org/10.33791/2222-4408-2022-4-7-12

ISSN 2222-4408 (Print)
ISSN 2686-8083 (Online)

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Screening for keratoconus early signs in planning keratorefractive surgery

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About the Authors

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