Changes in Axial Length Following Trabeculectomy and Ahmed Glaucoma Valve Implantation.

Bae, Soong Hwan; Kwon, Young A; Kim, Hwang Ki; Sohn, Yong Ho

Original Article

Journal of the Korean Ophthalmological Society 2006;47(11):1769-1775.
Published online November 30, 2006.

Changes in Axial Length Following Trabeculectomy and Ahmed Glaucoma Valve Implantation.

Soong Hwan Bae, Young A Kwon, Hwang Ki Kim, Yong Ho Sohn

Myung-Gok Eye Research Institute, Kim's Eye Hospital, Konyang University, Seoul, Korea. yhsohn@konyang.ac.kr

녹내장 수술 후 안축장의 변화

배숭환,권영아,김황기,손용호

Myung-Gok Eye Research Institute, Kim`s Eye Hospital, Konyang University, Seoul, Korea

Correspondence: Soong Hwan Bae, M.D.

Abstract

PURPOSE
This study examines the changes in axial length after trabeculectomy and Ahmed glaucoma valve implantation surgery. METHODS: In the forty three eyes of the 42 patients who had the uncontrolled glaucoma, 22 eyes of 21 patients having trabeculectomy and 21 eyes of 21 patients having Ahmed glaucoma valve implantation from October 2004 to September 2005 at Kim's Eye Hospital were analyzed prospectively. These patients had IOP and axial length measurements preoperatively, at 1 week, 1 month, and 3 months after surgery and refractive power measurements preoperatively, at 3 months after surgery. Axial length was measured by IOL Master(R). RESULTS: There was a statistically significant reduction in IOP after 3 months of 26.6+/-11.2 mmHg overall, 22.4+/-8.4 mmHg following trabeculectomy, and 30.9+/-12.3 mmHg after Ahmed glaucoma valve implatation (p<0.001). There was a statistically significant reduction in axial length after 3 months of -0.24+/-0.10 mm overall, -0.21+/-0.1 mm after trabeculectomy and -0.28+/-0.1 mm after Ahmed glaucoma valve implantation. CONCLUSIONS: There was a statistically significant decrease in axial length after both trabeculectomy and Ahmed glaucoma valve implantation. We must consider the influence of axial length change on refraction in planning combined glaucoma and cataract surgery or future IOL implantation.

Key Words: Ahmed glaucoma valve;Axial length;Trabeculectomy