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Pterygium Is Related to a Decrease in Corneal Endothelial Cell Density

Hsu, Min-Yen MD*,†; Lee, Hsin-Nung MD*; Liang, Chiao-Ying MD*; Wei, Li-Chen MD*; Wang, Chun-Yuan MD*; Lin, Keng-Hung MD*; Shen, Ying-Cheng MD*

Cornea:
doi: 10.1097/ICO.0000000000000149
Clinical Science
Abstract

Purpose: The aim of this study was to investigate the relationship between pterygium and a decrease in the corneal endothelial cell density (ECD) in patients with unilateral primary pterygium.

Methods: In this retrospective cross-sectional study, 90 consecutive patients with unilateral primary pterygium were enrolled from January 2010 to June 2012. Corneal ECD was measured in both eyes, and the fellow eyes were considered as controls. The relationship between the percentage of pterygium to cornea and a decrease in the ECD was analyzed. An increase in astigmatism in eyes with pterygium was evaluated for association with decreased ECD using the Pearson correlation test.

Results: The percentage of pterygium to cornea ranged from 3.5% to 65.2%, with a median of 12.35%. The difference in the corneal ECD between eyes with pterygium and control eyes ranged from +9.6% to −37.7%, with a median of −9.75%. The results of the Pearson correlation statistical test showed a strong logarithmic correlation between a decrease in the corneal ECD and the percentage of pterygium to cornea (R = 0.688, P < 0.001). An increase in astigmatism was correlated with a decrease in the ECD in eyes with pterygium.

Conclusions: Pterygium is related to a decrease in corneal ECD. Surgical intervention should be considered in patients with extensive pterygium involvement in the cornea or a significant increase in astigmatism.

Author Information

*Department of Ophthalmology, Taichung Veterans General Hospital, Taichung, Taiwan; and

The Institute of Nanoengineering and Microsystems, National Tsing Hua University, Hsinchu, Taiwan.

Reprints: Ying-Cheng Shen, MD, Department of Ophthalmology, Taichung Veterans General Hospital, No. 1650, Sec. 4, Taiwan Boulevard, Taichung 40705, Taiwan, ROC (e-mail: eric550131@yahoo.com.tw).

M.-Y. Hsu, H.-N. Lee, K.-H. Lin and Y.-C. Shen contributed equally to this study.

Supported in part by research grants from Taichung Veterans General Hospital, Taichung, Taiwan.

The authors have no conflicts of interest to disclose.

Received January 07, 2014

Accepted April 08, 2014

© 2014 by Lippincott Williams & Wilkins.