COMPARISON OF RECIPIENT - DONOR DISPARITY ON REFRACTIVE ERROR IN PENETRATING KERATOPLASTY FOR KERATOCONUS PATIENTS

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SHOJA M.R.; RASTEGR A.GH.

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Journal: JOURNAL OF CURRENT OPHTHALMOLOGY Year:2006 | Volume:19 | Issue:1 Page(s): 23-30

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Title

COMPARISON OF RECIPIENT - DONOR DISPARITY ON REFRACTIVE ERROR IN PENETRATING KERATOPLASTY FOR KERATOCONUS PATIENTS

Author(s)

SHOJA M.R. | RASTEGR A.GH. | Issue Writer Certificate

Keywords

KERATOCONUS DONORQ3

RECIPIENT DISPARITYQ3

KERATOMETRYQ3

Abstract

Purpose: To evaluate the effect of recipient-donor disparity on spherical equivalent refractive error and corneal curvature in penetrating keratoplasty (PKP) for keratoconus.Materials &Methods: A prospective randomized clinical trial was conducted between April 2000 and April 2004 in Yazd. Forty keratoconus patients were randomly assigned to two groups. In group I (n=20) the patients were operated with 0.25mm oversized donor and in group II (n=20) with 0.5mm disparity.VA, Spherical Equivalent and KERATOMETRY were compared between the two groups. Patients were followed for a mean period of 22.4 months. Both groups were operated on by the same surgeon and with the same technique.Results: Mean spherical equivalent was -3.10 in the first group and -4.25 in the second group (P=0.023).We found a better final visual acuity in group I when compared with group II. More myopic shift was observed with greater disparity (group II).Best corrected visual acuity (BCVA) at final follow-up was better in group I when compared with group II. Fourteen eyes (70%) achieved BCVA of 20/40 or better in group I whereas, ten eyes (50%) achieved this vision in group II.The mean astigmatic refractive error was minimally different between the two groups. This difference was statistically insignificant.Mean KERATOMETRY were 43.3+1.6 and 45.3+1.80 in group I and II respectively.There was a mean difference of 1.50 between the two groups (P=0.01).Conclusion: It seems that minimizing the size difference between donor and recipient or using same - size trephines will diminish final spherical equivalent. Post PKP myopia in keratoconus can be decreased by reducing recipient – donor trephine disparity.

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APA: Copy

SHOJA, M.R., & RASTEGR, A.GH.. (2006). COMPARISON OF RECIPIENT - DONOR DISPARITY ON REFRACTIVE ERROR IN PENETRATING KERATOPLASTY FOR KERATOCONUS PATIENTS. JOURNAL OF CURRENT OPHTHALMOLOGY, 19(1), 23-30. SID. https://sid.ir/paper/53087/en

Vancouver: Copy

SHOJA M.R., RASTEGR A.GH.. COMPARISON OF RECIPIENT - DONOR DISPARITY ON REFRACTIVE ERROR IN PENETRATING KERATOPLASTY FOR KERATOCONUS PATIENTS. JOURNAL OF CURRENT OPHTHALMOLOGY[Internet]. 2006;19(1):23-30. Available from: https://sid.ir/paper/53087/en

IEEE: Copy

M.R. SHOJA, and A.GH. RASTEGR, “COMPARISON OF RECIPIENT - DONOR DISPARITY ON REFRACTIVE ERROR IN PENETRATING KERATOPLASTY FOR KERATOCONUS PATIENTS,” JOURNAL OF CURRENT OPHTHALMOLOGY, vol. 19, no. 1, pp. 23–30, 2006, [Online]. Available: https://sid.ir/paper/53087/en

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