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|Title: ||Changes in Corneal Topography after 25-Gauge Transconjunctival Sutureless Vitrectomy versus after 20-Gauge Standard Vitrectomy|
|Authors: ||Okamoto, F.|
|Issue Date: ||Dec-2007 |
|Publisher: ||Elsevier Inc.|
|Journal Title: ||Ophthalmology|
|Start Page: ||2138|
|End Page: ||2141|
To evaluate the changes in regular and irregular corneal astigmatism after 25-gauge transconjunctival sutureless vitrectomy and 20-gauge standard vitrectomy.
Prospective observational comparative case series.
Thirty-two eyes of 32 patients undergoing 25-gauge transconjunctival sutureless vitrectomy and 25 eyes of 24 patients undergoing 20-gauge standard vitrectomy.
Corneal topography was obtained preoperatively and at 2 weeks and 1 month postoperatively.
Main Outcome Measures
The dioptric data of the central 3-mm zone of the cornea were decomposed using Fourier harmonic analysis into spherical power, regular astigmatism, asymmetry, and higher-order irregularity.
None of the 4 Fourier indices changed throughout the observation period in the 25-gauge group. In the 20-gauge group, regular astigmatism, asymmetry, and higher-order irregularity were increased significantly at 2 weeks after vitrectomy (P<0.05, Wilcoxon signed-ranks test) and returned to preoperative levels by 1 month. The spherical power in the 20-gauge group did not change after surgery. For regular astigmatism, asymmetry, and higher-order irregularity, the 20-gauge group showed significantly greater surgically induced changes than the 25-gauge group (P<0.05, Mann–Whitney U test).
Twenty-five–gauge transconjunctival sutureless vitrectomy does not induce significant changes in corneal topography and exerts little influence on the optical quality of the cornea.|
|Rights: ||© 2007 by the American Academy of Ophthalmology|
|Text Version: ||author|
|Appears in Collections:||Ophthalmology|
大鹿 哲郎 (Oshika Tetsuro)
加治 優一 (Kaji Yuichi)
平岡 孝浩 (Hiraoka Takahiro)
岡本 史樹 (Okamoto Fumiki)
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