Table 2.

Normality check results (Shapiro–Wilk W test) for NEI VFQ 25 and 39 and IVI-28

	Pre-operative					Post-operative
	W stat	p		W stat	p	W stat	p		W stat	p
	NEI VFQ 25			NEI VFQ 39		NEI VFQ 25			NEI VFQ 39
(A) NEI VFQ 25 and 39
General health status	0.858		0.001	0.933	0.039	0.862		0.001	0.925	0.022
General vision status	0.867		0.010	0.969	0.434	0.689		0.001	0.869	0.001
Ophthalmic pain	0.897		0.004	0.897	0.004	0.787		0.001	0.787	0.001
Near vision activities	0.924		0.021	0.838	0.002	0.807		0.001	0.718	0.001
Distant vision activities	0.971		0.483	0.958	0.208	0.796		0.001	0.813	0.001
Social functionality	0.764		0.001	0.753	0.001	0.621		0.001	0.613	0.001
Mental health	0.941		0.066	0.945	0.086	0.770		0.001	0.775	0.001
Difficulties in activities	0.902		0.005	0.911	0.009	0.653		0.001	0.675	0.001
Dependence	0.790		0.001	0.781	0.001	0.474		0.001	0.465	0.001
Driving	0.953		0.291	0.953	0.291	0.759		0.001	0.759	0.001
Color vision	0.172		0.001	0.172	0.001	0.172		0.001	0.172	0.001
Peripheral vision	0.773		0.001	0.773	0.001	0.624		0.001	0.624	0.001
(B) IVI-28
Mobility and independence	72.47±15.49			0.951	0.145	84.35±15.36			0.925	0.121
Emotional well-being	63.71±12.60			0.942	0.078	81.57±14.43			0.890	0.016
Reading and information awareness	59.93±8.54			0.866	0.001	76.37±9.34			0.877	0.001

Abbreviations: NEI, National Eye Institute; VFQ, Visual Function Questionnaire.