A Comparison between Tube Surgery, ND:YAG Laser and Diode Laser Cyclophotocoagulation in the Management of Refractory Glaucoma

Table 6

Pre- and posttreatment visual acuities for each group. Changes in VA category represent 2 or more lines of Snellen acuity change.

Group	Median pre-Rx VA (range)	Median post-Rx VA (range)	↑VA	↓VA	Stable VA
CycloYAG	CF (6/9-NPL)	CF (6/9-NPL)	4	3	38
Cyclodiode	CF (6/9-NPL)	CF (6/9-NPL)	2	4	39
Tube	6/60 (6/6-HM)	6/60 (6/6-HM)	5	7	33
𝑃 value	0.004	0.04	0.695

Statistical significance 𝑃<0.05 (Kruskal-Wallis one-way ANOVA).