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Refractive outcome after corneal graft with same size punch and trephine sets for treatment of keratoconus

Poster Details

First Author: H.Razmjoo IRAN

Co Author(s):    M. Ghoreishi   I. Ghafuri   A. Peyman        

Abstract Details


To evaluate refractive outcome of penetrating keratoplasty (PKP) and deep anterior lamellar keratoplasty (DALK) for keratoconus with same size punch and trephine sets.


Eye research center, Feiz hospital, Isfahan University of Medical Sciences, Isfahan, Iran


In this study, 35 patients underwent corneal transplantation by PKP and 35 patients by DALK. We used Katena Barron vacuum punch/trephine sets. Diameter of punch and trephine were chosen the same in all patients (7.75 or 8.00 mm according to surgeon preference). Standard PKP performed with 8 separate and 1 running 10-0 nylon stitches. Baring of Descemet's membrane in DALK group carried out with big bubble technique. Patients evaluated 3 month after removal of all sutures regarding their vision and refractive error.


Median corrected acuity in both PKP and DLK groups were 0.5 decimal notation, we were not able to disclose any significant difference between two groups. 17.1 % of PKP group and 25.7 % of DLK group had corrected acuity equal to or better than 0.8. 77.1 % in PKP group and 68.6 % in DALK group had acuity between 0.8 and 0.3. The difference between two groups was not statistically significant (P=0.83). Mean spherical equivalent refractive error in PKP and DALK groups was -3.86 +/- 3.72 and -2.78 +/- 4.19 diopters respectively. The difference was not statistically significant between two groups.


Both PKP and DALK performed with same-size punch/trephine sets are acceptably effective methods for treatment of advanced forms of keratoconus. We were not able to disclose any difference regarding visual and refractive parameters between two groups. FINANCIAL INTEREST: NONE

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