Table 2.

LogMAR visual acuity and contrast sensitivity in different study groups

Sample no.	Subjects	No. of eyes	LogMAR visual acuity	Contrast sensitivity	Correlation	Significance
			Mean ± SD	Mean ± SD	r	p
1	Controls	226	0.187 ± 0.232	1.428 ± 0.271	−0.824	<0.001
2	Cases without diabetic retinopathy	281	0.344 ± 0.221	1.119 ± 0.286	−0.466	<0.001
3	Cases with non-proliferative diabetic retinopathy	93	0.353 ± 0.231	1.161 ± 0.233	−0.307	0.003
4	Cases with proliferative diabetic retinopathy	8	0.300 ± 0.020	0.920 ± 0.027	−0.456	0.440