Accommodative Changes with Center-Near Multifocal Contact Lenses in Young Adults with Accommodative Infacility

Abstract

Purpose : To evaluate changes in accommodative function after near works in young myopes with accommodative infacility fitted with center-near multifocal soft contact lenses. Methods : Thirty-one soft contact lens wearers were participated and divided into the accommodative infacility group and normal group according to the accommodative facility. Subjects were fitted with single vision contact lenses (SVCLs) and center-near mid-add multifocal soft contact lenses (MFCLs). In case of MFCLs wearing, accommodative functions were measured after more than 7 days of adaptation. The amplitude of accommodation, near point of convergence, accommodative facility and vergence facility were measured after watching video using a smartphone for inducing accommodative burden for 30 minutes. Results : Among the subjects, twenty-four were normal in accommodative facility and seven were accommodative infacility. In young adults group with accommodative infacility, the near point of accommodation after watching video, was significantly increased with SVCLs(p=0.012) and no difference with MFCLs compared with before watching video. And the near point of convergence with MFCLs after watching video was significantly shorter than that with SVCLs, and shorter than before watching video(p=0.009), and accommodative facility with MFCLs was statistically significant increased compared with SVCLs, and higher than that of before video watching(p=0.004). Conclusion : The med-add center-near MFCLs enhance accommodative function that could be effective to alleviated accommodative burden for the young adults with accommodative infacility.