To investigate the effects of contact lens (CL) on the frequency of pinguecula, and the relationship between dry eye disease and pinguecula.
Two hundred and 33 cases of soft CL wearers and 230 age-matched nonwearers were enrolled in the study. Schirmer I test (ST) scores and tear break-up time (TBUT) were determined in all participants. A questionnaire including ocular surface disease index (OSDI), age, sex, and duration of CL wear was implemented to the participants before the examination.
The prevalence of pinguecula was 27.8% (n: 65) in the CL group and 26.5% (n: 61) in the control group. There was no significant difference between the groups (P=0.841). The prevalence of pinguecula increased with age in both groups. There was no significant difference in the prevalence of pinguecula when users were divided into three groups according to the duration of CL wear (P=0.575). The TBUT scores were lower, and the OSDI scores were higher in the CL group. The TBUT scores were lower in patients with pinguecula in both groups. The OSDI scores were higher in the CL group. There was no significant difference regarding the OSDI scores between patients with pinguecula and healthy participants in the CL group; however, OSDI scores were significantly higher in patients with pinguecula in control group. There were no significant differences in the ST scores between the groups, and between patients with pinguecula and healthy participants.
This is the second study that evaluates the effects of soft CL wearing on pinguecula prevalence. We found that CL wearing does not affect the prevalence of pinguecula. Considering the OSDI scores in patients with pinguecula in the CL group, CL may suppress the irritant symptoms of pinguecula.