Table 1.

Demographic characteristics of the patients (age, gender, education, and contact lens use and high contrast (Snellen) and low contrast visual acuity (letters)) according to the groups (*P < 0.05; **P < 0.001).

	Keratoconus group	Control group	P
Age	29.36 ± 10.60	30.23 ± 8.80	0.573
Gender
Female/male	16/14 (53/47%)	18/12 (600/40%)	0.916
Education level
Primary school	3 (10%)	6 (20%)	0.562
High school	20 (67%)	12 (40%)
University	7 (23%)	12 (40%)
Contact lens wear
None	10 (33%)	30	0.00**
One eye only	5 (17%)
Both eyes	15 (50%)
Visual acuity
Better eye	0.73 ± 0.23 (0.21 ± 0.23 LogMAR)	1.0 (0.0 logMAR)	0.00**
Worse eye	0.47 ± 0.27 (0.4 ± 0.33 LogMAR)	1.0 (0.0 logMAR)	0.001**
Low contrast visual acuity	23.27 ± 11.28 (0.54 ± 0.22 LogMAR)	45.00 ± 3.20 (0.10 ± 0.08 LogMAR)	0.001**