In recent years, there has been a lifestyle focus on UV, violet, blue and yellow light as ‘stressful’ or ‘necessary’ light for the eye. The wavelength ranges of UV, violet and blue light overlap, and it is important to consider the spectral balance of spectacle lenses to optimize these light exposures in the digital age and aging society. However, due to this wavelength overlap, it is difficult to distinguish between moderate and excessive exposure, particularly because the optimal level of light exposure varies from person to person. Basic, clinical and epidemiological research studies are needed to continue to develop lenses and educate users to protect their eyes from light.

Purpose: CGPack10 (CG10: Sun Contact Lens. Co. Ltd) is a newly developed mire ring image analysis program. We had the opportunity to use CG10 and investigate the validity of the analysis results using keratoconus eye.

Method: We enrolled patients who underwent examination via Wave-Front Analyzer KR-1W^® (KR1W^®: TOPCON) and anterior ocular OCT (CASIA^® SS-1000: TOMEY). Mire ring images obtained from KR1W^® were analyzed using CG10, and the relationship between KR1W^® measurements and CG10 analysis for Ks values, Kf values, and astigmatism axes were evaluated retrospectively.

Results: This study involved 19 eyes of 19 KC patients. We found significant correlations between KR1W^® measurements and CG10 analyses for Ks values, Kf values, and astigmatism axis. (Pearson correlation coefficient: 0.984, p < 0.05, 0.993, p < 0.01, 0.967, p < 0.01, respectively)

Conclusions: In mild to moderate keratoconus eyes, the CG10 analysis of the mire ring images was seemed to be valid.