Table 1. Numbers of retinal ganglion cells in each group.

Groups	Number of eyes	Average RGCs number/500 µm (mean±SD)	Percentage reduction
Control	5	19.5±1.03
Group A	4	17.6±0.89	9.74%
Group B	5	16.2±1.47a	16.9%
Group C	5	13.8±0.73a	29.2%
Group D	4	12.6±0.75a	35.4%
F		110.56
P		<0.01

^aSignificant difference (P<0.05) between the experimental groups and the control group (one-way ANOVA, LSD test).