Table 5

ANOVA statistics for the discrimination between the three groups: young/elderly/cataract (n = 112)

Dependent	Covariants	Right eye		Left eye		Both eyes
Dependent	Covariants	F	P	F	P	F	P
In absence of any covariant (A and B), all tests discriminate between the groups. If visual acuity and contrast sensitivity are covariant (C), only the stray light meters and the Nyktotests and Mesotests with glare discriminate between the groups. In all comparisons, F values are highest for the CSLM and NSLM
(A) Visual acuity and contrast sensitivity
Visual acuity	None	19.48	<0.001	27.91	<0.001	27.17	<0.001
Contrast sensitivity	None	24.32	<0.001	46.63	<0.001	32.87	<0.001
(B) Glare/stray light
Conventional stray light meter	None	53.41	<0.001	49.88	<0.001	NA	NA
New stray light meter	None	69.51	<0.001	63.80	<0.001	63.78	<0.001
Nyktotest	None	11.66	<0.001	14.31	<0.001	16.31	<0.001
Mesotest	None	13.04	<0.001	12.57	<0.001	12.61	<0.001
Nyktotest with glare	None	20.31	<0.001	22.34	<0.001	28.50	<0.001
Mesotest with glare	None	25.77	<0.001	26.28	<0.001	35.50	<0.001
(C) Glare/stray light with co-variants
Conventional stray light meter	Visual acuity, contrast sensitivity	15.88	<0.001	8.11	0.001	NA	NA
New stray light meter	Visual acuity, contrast sensitivity	31.36	<0.001	23.39	<0.001	29.69	<0.001
Nyktotest	Visual acuity, contrast sensitivity	2.07	0.131	0.62	0.539	4.47	0.014
Mesotest	Visual acuity, contrast sensitivity	3.10	0.049	0.73	0.486	2.28	0.107
Nyktotest with glare	Visual acuity, contrast sensitivity	8.49	<0.001	5.04	0.008	14.18	<0.001
Mesotest with glare	Visual acuity, contrast sensitivity	11.64	<0.001	9.92	<0.001	17.09	<0.001

Measurement of stray light and glare: comparison of Nyktotest, Mesotest, stray light meter, and computer implemented stray light meter

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