Discussion
redness, visual behavior, fatigue, lens wear
LENS, CORNEA
Analysis of the ocular surface condition after wearing large-diameter multifocal contact lenses for 2 weeks revealed that although the redness of the limbus and corneal fluorescent staining worsened compared to baseline measurements, but the values were both within the clinically normal and acceptable standardMeasurements of tear quality can be conducted in two stages: the front surface of the contact lens and the front surface of the corneaOne limiting factor of this study was the duration being only 2 weeks of data collection for each subject. Given the limited time frame, it is impossible to conclude whether prolonged wear of the lens beyond the 2-week period will have continuous negative impact on the tear film quality the front of the contact lens and the front surface of the cornea. However, analysis of tear changes showed that among the three lens groups, Optimum exerts higher stability of tear films, which may be related to the design and rigid lens material. Further investigation is necessary to be conclusive.Blink frequency is a major factor affecting the stability of the tear film. Each complete blink will allow even distribution of the tear film covering the ocular surface to increase stability and concurrently improve visual qualityThe simulated value of the MTF of the total aberration and measurement results with contact lenses have better visual quality than the eye without wearing contact lenses at the beginning. This result shows that the difference is possibly due to the correction of ametropiaThe subjective questionnaire showed little difference in the scores of the OSDI before and after wearing contact lenses. On the other hand, the visual behavior performance scale significantly improved after 1 week of lens wear. Previous studieshave proposed that there is a significant proportional relationship between the ocular surface disease index scale and the convergence fatigue symptom survey (CISS) showing benefits to enhance basic binocular visual function test to the evaluation of DES