Modified Ruiz procedure for reducing high astigmatism after penetrating keratoplasty.

Abstract:

PURPOSE:To evaluate the refractive, keratometric, and visual outcomes of a modified Ruiz procedure in patients with high astigmatism after penetrating keratoplasty (PKP). METHODS:Retrospective cohort study with 26 eyes of 24 patients. A modified Ruiz incision pattern was used. Two paired arcuate incisions, centered on the preoperative cylinder axis, were performed over 2 o'clock hours (60 degrees) within the graft. The median optical zone was 4.5 mm (range, 3-5 mm). Subsequently, 4 radial cuts were made. The depth of all cuts was 90%-95% of the central corneal thickness. The follow-up time was 3 months. RESULTS:The mean preoperative subjective cylinder was 8.75 +/- 3.05 D, decreasing to 5.31 +/- 3.12 D postoperatively. Three months after the procedure, 53.8% of the eyes had <5.0 D of refractive astigmatism and 47% of eyes had <5.0 D of keratometric astigmatism. For the refractive data, the mean correction index was 1.95; the mean index of success was 1.27. The mean reduction in spherical equivalent was 1.95 D (60.5%). The mean best-corrected visual acuity (BCVA) was 0.61 and did not change significantly. Three eyes gained 2 or more lines of BCVA, and 1 eye lost 2 or more lines of BCVA. There was no difference in subgroup analysis of eyes treated with 4- (13 eyes) or 5-mm (12 eyes) optical zones. CONCLUSIONS:The modified Ruiz procedure is an effective method to reduce high astigmatism after PKP. However, the results were widely scattered, and the patients need to be informed about the unpredictable outcome and its consequences.

journal_name

Cornea

journal_title

Cornea

authors

Zuberbuhler B,Agrawal A,Gale R,Kipioti T,Gauba V,Noble B

doi

10.1097/ICO.0b013e318153f241

subject

Has Abstract

pub_date

2007-12-01 00:00:00

pages

1171-7

issue

10

eissn

0277-3740

issn

1536-4798

pii

00003226-200712000-00003

journal_volume

26

pub_type

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