The results of the intrastromal corneal segments (Keraring) implantation for keratoconus

    ABSTRACT

    The results of the intrastromal corneal segments (Keraring) implantation for keratoconus

    M.M. Bikbov, G.M. Bikbova, A.H. Iskhakova

    The Ufa Eye Research Institute, the Republic of Bashkortostan

    

    Purpose. The aim of the study was to evaluate functional results of Keraring implantation with for keratoconus.

    Material and methods. Keraring implantation were performed in 46 patients (52 eyes) aged from 16 to 49 years, with progressive keratoconus of the degree I-III of Amsler classification with intolerance of contact correction. To assess the results before and after operation the patients received standard and special methods of research: computer keratotopography («ODP-scan», Nidek, Japan), optical coherence tomography («OCT-3», Visante, Germany), corneal confocal microscopy (Heidelberg Retinal Tomographer HRT-III, «Heidelberg Engineering» (Germany) in pre- and post-operative follow-up: 10 days, 1, 3, 6 and 12 months.

    Results. Uncorrected visual acuity increased from 0.14±0.03 to 0.45±0.15, immediately after the operation. Keratometry value decreased from 54.27±0.91D to 43.61±1.24D. The magnitude of corneal astigmatism decreased from 6.45±1.23D pre-operatively to 4.25±0.96D one month after surgery, with a gradual decrease to 2.91±0.42D and 2.5±0.22D at 6 months and a year after implantation.

    Conclusions. The intrastromal corneal segments Keraring implantation is a technically simple, effective method of keratoconus treatment, which allows to adjust the associated keratoconic ametropia.

    Key words: keratoconus, intrastromal corneal segments Keraring.