(a).

Ranks
	Cataract type	N	Mean rank
Total pain score	PSC	19	20,16
	WMC	18	32,92
	CN + PSC	19	32,66
	Total	56
Stage 1	PSC	19	26,66
	WMC	18	29,28
	CN + PSC	19	29,61
	Total	56
Stage 2	PSC	19	19,11
	WMC	18	34,61
	CN + PSC	19	32,11
	Total	56
Stage 3	PSC	19	26,34
	WMC	18	30,33
	CN + PSC	19	28,92
	Total	56

N: number.