E.S. BRANCHEVSKAYA¹, S.L. BRANCHEVSKY^1,2

¹Branchevsky Eye Clinic, 371 Novo-Sadovaya St., Samara, Russian Federation ,443125

²Samara State Medical University, 89 Chapaevskaya St., Samara, Russian Federation, 443099

  Branchevskaya E.S. ― PhD (medicine), Head of the Division of excimer laser correction, tel. (846) 925-31-31, e-mail: branchevskaya@glaza63.ru

Branchevsky S.L. ― PhD (medicine), Assistant Professor of the Department of Eye Diseases of Institute of Postgraduate Education, tel. (846) 925-31-31, e-mail: branchevski@glaza63.ru

 The article presents the results of implantation of corneal segments to 21 patients with keratoconus (31 eyes). After the operation, an increase in the uncorrected and corrected visual acuity from 0.24±0.24 to 0.45±0.30 and from 0.58±0.27 to 0.72±0.25, respectively, was noted, and therefore, a decrease in the spherical and cylindrical components of refraction. The effect of segments on the parameters of the anterior surface of the cornea is more pronounced than on the parameters of the posterior surface of the cornea. So, on the front surface of the cornea, the average value of the maximum keratometry decreased by 4 dioptres, and on the back surface it increased by 0.3 dioptre. The statistically significant decrease in the Q constant and astigmatism was noted along the anterior surface, no statistically significant changes in these parameters were detected on the posterior surface.

Key words: keratoconus, implantation of corneal segments, keratotopography.

(For citation: Branchevskaya E.S., Branchevsky S.L. Evaluation of refractive index and morphometric parameters of the cornea of patients with keratoconus after the operation of intrastromal keratoplasty with implantation of corneal segments. Practical Medicine. 2018)

REFERENCES

1. Doga A.V., Kishkin Yu.I., Izmaylova S.B., Branchevskaya E.S. Topographically oriented PRK in correction of wrong astigmatism in patients with keratoconus. Oftal’mokhirurgiya, 2015, no. 2, pp. 46-52 (in Russ.).
2. Izmaylova S.B. Mediko-tekhnologicheskaya sistema khirurgicheskogo lecheniya progressiruyushchikh keratektaziy razlichnogo geneza: dis. … d-ra med. nauk [Medico-technological system of surgical treatment of progressive keratectases of various genesis. Dis. Dr med. sciences]. Moscow, 2014. 310 p.
3. Malyugin B.E., Izmaylova S.B., Avramenko S.A., Merzlov D.E. Treatment of paracentral ectases of various genesis by the method of intrastromal keratoplasty with the implantation of a single corneal segment. Oftal’mokhirurgiya, 2011, no. 4, pp. 16-22 (in Russ.).
4. Pronkina S.A. Khirurgicheskoe lechenie keratektaziy razlichnogo geneza metodom intrastromal’noy keratoplastiki polimernymi rogovichnymi implantami: dis. … kand. med. nauk [Surgical treatment of keratectasias of various genesis by the method of intrastromal keratoplasty with polymeric corneal implants. Dis. Dr med. sciences]. Moscow, 2014. 162 p.
5. Coskunseven E., Jankov M.R., Hafezi F. Contralateral eye study of corneal collagen cross-linking with riboflavin and UVA irradiation in patients with keratoconus. J. Refract. Surg, 2009, no. 25, pp. 371-376.
6. Doga A.V., Branchevskaya E.S., Kishkin Y.I., Izmailova S.B. Femtosecond laser-assisted intracorneal ring segments implantation, corneal collagen cross-linking and topography-guided PRK in combined keratoconus treatment. American Academy of Ophthalmology. Chicago, 2014. P. 131.
7. Kanellopoulos A.J., Binder P.S. Collagen cross-linking (CCL) with sequential topography-guided PRK: a temporizing alternative for keratoconus to penetrating keratoplasty. Cornea, 2007, 26, pp. 891-895.
8. Malyugin B., Merzlov D., Pokrovskiy D., Branchevskaya E. Comprehensive complex treatment of progressive keratectasia of different types without keratoplasty. XXXI Congress of the European Society of Cataract and Refractive Surgeons (ESCRS). Amsterdam, 2013, available at: http://www.escrs.org/amsterdam2013/programme/posters-details.asp?id=19308
9. Pietrini D., Tony Guedj T., Strategy for boosting visual acuity in keratoconus patients. J. Cataract. Refract. Surg. Today, 2012, Febr., pp. 32-34.
10. Torquetti L., Arce C. et al. Evaluation of anterior and posterior surfaces of the cornea using dual Scheimpflug analyzer in keratoconus patients implanted with intastromal corneal ring segments. Int. J. Ophthalmol, 2016, vol. 9, no. 9, pp. 1283-1288.