Lee EK, Yun YJ, Lee JE, Yim JH, Kim CS. Changes in corneal endothelial cells after Ahmed glaucoma valve Implantation: 2-year follow-up. Am J Ophthalmol 2009;148:361–367.

In the September 2009 issue, an error occurs in the fifth column of Table 3 . The baseline ECD count in the supratemporal area in the control was incorrectly stated as 2152±628, this should be 2550±589 at baseline. The corrected Table 3 is shown below.

TABLE 3

Change in Endothelial Cell Count in Each Measured Area and Overall Average after Ahmed Glaucoma Valve Implantation

Time of Examination	Superior		Supratemporal		Supranasal		Center		Average
	Subject	Control	Subject	Control	Subject	Control	Subject	Control	Subject	Control
Baseline	2243 ± 705	2426 ± 566	2382 ± 655	2550 ± 589	2223 ± 764	2501 ± 628	2152 ± 658	2386 ± 620	2250 ± 657	2466 ± 589
1 mo	2089 ± 824 b	2372 ± 550	2280 ± 708 b	2554 ± 585	2117 ± 771	2469 ± 492	2047 ± 700	2362 ± 505	2134 ± 698 b	2439 ± 626
% a	−8.7 ± 7.8 c	−2.8 ± 6.1	−4.4 ± 6.3 c	1.4 ± 5.8	−5.7 ± 7.2 c	−0.8 ± 4.1	−4.6 ± 7.3	−1.2 ± 4.2	−5.8 ± 7.1 c	−0.8 ± 6.4
6 mos	1999 ± 823 b	2381 ± 626	2087 ± 735 b	2478 ± 601	2040 ± 816 b	2483 ± 668	1958 ± 717 b	2351 ± 599	2021 ± 742	2423 ± 607
% a	−11.7 ± 10.2 c	−3.2 ± 6.3	−13.9 ± 12.3 c	−2.2 ± 6.2	−12.5 ± 10.0	−1.0 ± 6.0	−8.6 ± 10.7	−2.2 ± 5.7	−11.5 ± 9.0 c	−2.1 ± 5.7
12 mos	1880 ± 811 b	2385 ± 623	1939 ± 765 b	2466 ± 610	1943 ± 843 b	2432 ± 658	1881 ± 729 b	2295 ± 626	1910 ± 794 b	2395 ± 600
% a	−16.2 ± 14.9 c	−3.3 ± 5.5	−18.0 ± 15.9 c	−2.5 ± 7.2	−14.6 ± 12.7 c	−2.9 ± 6.1	−12.6 ± 11.3 c	−2.8 ± 6.1	−15.3 ± 13.8 c	−2.8 ± 6.1
18 mos	1798 ± 821 b	2345 ± 624	1911 ± 736 b	2457 ± 628	1877 ± 832 b	2424 ± 697	1839 ± 729 b	2330 ± 642	1857 ± 758 b	2389 ± 632
% a	−18.0 ± 16.6 c	−4.6 ± 6.5	−18.5 ± 16.0 c	−4.0 ± 6.9	−17.2 ± 16.5 c	−3.7 ± 5.6	−14.1 ± 10.4 c	−2.5 ± 6.7	−16.6 ± 13.4 c	−3.7 ± 6.7
24 mos	1771 ± 845 b	2266 ± 624	1795 ± 817 b	2435 ± 590	1771 ± 817 b	2370 ± 699	1801 ± 744 b	2297 ± 638	1785 ± 781 b	2342 ± 649
% a	−20.6 ± 18.2 c	−4.8 ± 5.2	−22.6 ± 17.7 c	−4.2 ± 6.9	−18.1 ± 15.9 c	−3.8 ± 6.9	−15.4 ± 10.8 c	−3.7 ± 5.2	−18.6 ± 16.8 c	−4.2 ± 7.2

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