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Why Was There No Correlation Between Anterior Chamber Depth and Intraocular Pressure Change After Phacoemulsification in Patients With Narrow Angles?—Reply

Shan C. Lin, MD; Guofu Huang, MD, PhD
Arch Ophthalmol. 2012;130(10):1352-1353. doi:10.1001/archophthalmol.2012.1837.
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In reply

We appreciate the interest and comments from Cheng and colleagues related to the correlation between ACD and IOP change after phacoemulsification in our study.1

We agree that there is likely a strong association of ACD with IOP reduction observed after phacoemulsification. However, we would like to point out a few differences between the articles that were cited and our own results. First, both the article by Kashiwagi et al2 and that by Issa et al3 found statistical inverse correlations between preoperative ACD and reduction in IOP. In our article, we reported the association of change in ACD from the preoperative value to after cataract surgery with IOP change (P = .08). Second, different devices were used in all 3 articles to measure ACD—scanning peripheral anterior chamber analyzer in the article by Kashiwagi et al,2 A-scan ultrasound biometry in the article by Issa et al,3 and anterior segment optical coherence tomography in our article. Finally, Kashiwagi and colleagues included subjects who had peripheral anterior synechiae and were receiving glaucoma therapy, whereas our study excluded patients who had either of those features.


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October 1, 2012
Jason Cheng, MBBS, BSc, MRCOphth, FRCOphth; K. Sheng Lim, MD, FRCOphth
Arch Ophthalmol. 2012;130(10):1352-1353. doi:10.1001/archophthalmol.2012.2226.
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