Table 3.

Mean values for the optical-quality parameters of the eye, before and after alcohol intake, for all the participants and for the groups of high and low alcohol levels (breath alcohol content [BrAC] in mg/L). Strehl ratio, MTF (modulation-transfer function) cut-off, optical scattering index (OSI), and tear volume (in mm) are presented. Standard deviation included.

BrAC (mg/L)	<0.25	≥0.25	Total
Strehl ratio
Before	0.248 ± 0.068	0.251 ± 0.074	0.249 ± 0.072
After	0.232 ± 0.072	0.214 ± 0.071	0.221 ± 0.072
P value	0.023	<0.001	<0.001
OSI
Before	0.55 ± 0.35	0.56 ± 0.45	0.56 ± 0.41
After	0.60 ± 0.56	0.73 ± 0.61	0.68 ± 0.59
P value	0.184	<0.001	<0.001
Tear volume (mm)
Before	23.2 ± 7.3	24.3 ± 7.8	23.8 ± 7.6
After	22.2 ± 9.2	21.3 ± 7.7	21.6 ± 8.3
P value	0.476	0.001	0.003