Abstract
Purpose To evaluate the axis difference between corneal and internal astigmatism in patients with cataract, because if the axis of corneal astigmatism is opposite to the axis of internal astigmatism, the amount of refractive astigmatism will increase after cataract surgery owing to disappearance of the neutralizing effect of the crystalline lens on corneal astigmatism. Design Retrospective cross-sectional study. Methods One hundred eighty patients (180 eyes) who underwent cataract surgery were enrolled. Preoperative refractive, corneal, and internal astigmatism were measured using a wavefront analyzer and retrospectively analyzed. On-axis was defined as an axis difference between corneal and internal astigmatism of 180 ± 10 degrees. Opposite-axis was defined as an axis difference between corneal and internal astigmatism of 90 ± 10 degrees. The remaining cases were defined as oblique-axis. Results Corneal and internal astigmatic vectors showed a tendency to have the opposite direction. An on-axis difference was seen in 10.0% of patients (18 eyes), oblique-axis in 69.4% of patients (125 eyes), and opposite-axis in 20.6% of patients (37 eyes). Of all eyes, 10.0% had an opposite-axis difference with more than 1.00 diopter (D) of both corneal and internal astigmatism. The percentage of eyes with an opposite-axis difference between corneal and internal astigmatism had a tendency to increase as corneal and internal astigmatism increased (P =.030 and P =.003, respectively). Conclusions A total of 10.0% of all eyes with cataract had an opposite-axis difference with more than 1.00 D of both corneal and internal astigmatism. In these cases, surgical techniques to reduce corneal astigmatism, such as a toric intraocular lens, should be recommended to increase patient satisfaction.
| Original language | English |
|---|---|
| Pages (from-to) | 1112-1119.e2 |
| Journal | American Journal of Ophthalmology |
| Volume | 156 |
| Issue number | 6 |
| DOIs | |
| Publication status | Published - 2013 Dec |
| Externally published | Yes |
Bibliographical note
Funding Information:All authors have completed and submitted the ICMJE Form for Disclosure of Potential Conflicts of Interest and none were reported. Publication of this article was supported by Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education, Science and Technology ( 2010-0007817 ), Seoul, South Korea. Contributions of authors: involved in design of study (Y.E., J.S.S.); conduct of study (Y.E., K.T.N., J.S.S.); data collection (Y.E., K.T.N.); analysis and interpretation of data (Y.E., J.S.S.); statistical expertise (Y.E., J.S.S.); writing the article (Y.E., J.S.S.); and critical revision of the article (Y.E., S.Y.K., H.M.K., J.S.S.).
ASJC Scopus subject areas
- Ophthalmology