Quality of vision has been emphasized in ophthalmologic clinical practice in recent years. The optical or visual performance of the human eye is not static and fluctuates over time. Considering the major origins of temporal fluctuations in optical or visual performance, quantitative assessment of the dynamic changes in the optical quality of the entire eye is important. This review provides an overview of the clinical application of the objective methods for assessing dynamic changes in optical quality, particularly those associated with accommodation, the precorneal tear film, the prelens tear film, and contact lens movement and fitting.