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Journal of Ophthalmology
Volume 2009, Article ID 210621, 3 pages
Clinical Study

Comparison of the Keratometric Corneal Astigmatic Power after Phacoemulsification: Clear Temporal Corneal Incision versus Superior Scleral Tunnel Incision

1Department of Opthalmology, Beijing Tongren Hospital, Capital Medical University, #1 Ton Giau Min alley, East district, Beijing 100730, China
2Department of Opthalmology, Beijing Tongren Hospital, #1 Ton Giau Min alley, East district, Beijing 100730, China
3Department of Surgery, University of Hawaii, Honolulu, Hawaii 96813-2421, USA
4Department of Opthalmology, China-Japan Friendship Hospital, Ing Hwa Yuen, Zhao Yang district, Beijing 100029, China

Received 18 September 2009; Accepted 28 November 2009

Academic Editor: Rupert M. Menapace

Copyright © 2009 Yongqi He et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Objective. This is prospective randomized control trial to compare the mean keratometric corneal astigmatism diopter power (not surgical induced astigmatism) among preop and one-month and three-month postop phacoemulcification of either a clear temporal corneal incision or a superior scleral tunnel Incision, using only keratometric astigmatic power reading to evaluate the difference between the two cataract surgery incisions. Methods. 120 patients (134 eyes) underwent phacoemulcification were randomly assigned to two groups: Group A, the clear temporal corneal incision group, and Group B, the superior scleral tunnel incision group. SPSS11.5 Software was used for statistical analysis to compare the postsurgical changes of cornea astigmatism on keratometry. Results. The changes of corneal astigmatic diopter in Groups A and B after 3 month postop from keratometric reading were 1.04 + 0.76 and 0.94 + 0.27, respectively ( 𝑃 = . 8 4 > .05), which showed no statistic significance difference. Conclusion. The incision through either temporal clear cornea or superior scleral tunnel in phacoemulcification shows no statistic difference in astigmatism change on keratometry 3-month postop.