Overview of Objective Methods for Assessing Dynamic Changes in Optical Quality

Abstract

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.

<p>Objective Evaluation Of On-Eye Optical Quality Of Daily Disposable Silicone Hydrogel Contact Lens With Internal Wetting Agents</p>

“…Previously, we utilized sequential measurements of HOAs and evaluated the effect of internal wetting agents added to hydrogel CLs7 and material of CLs on HOAs 18. In the current study, our results demonstrated that daily disposable SiHy CL with high molecular weight polyvinyl pyrrolidone enhanced the visual performance of CL wear during prolonged periods compared to a hydrogel lens without the incorporation of polyvinyl pyrrolidone as a wetting agent.…”

“…These results revealed that daily disposable senofilcon A lenses could maintain stable surface lens wettability, and thus, stable visual performance under prolonged gazing conditions. In previous studies,7,18 measurements were performed after only 1 hr of CL wear despite the fact that symptoms of eye dryness worsened towards the end of the day 19. Therefore, in the current study, we measured on-eye optical quality of SiHy daily disposable CLs closely at the end of the day after a 1-week use of the CLs, thus evaluating the visual performance in conditions similar to daily life.…”

Comparison of Ocular Wavefront Aberration Measurements Obtained Using Two Hartmann–Shack Wavefront Aberrometers

“…Previous studies with continuous wavefront measurements have reported microfluctuations in steady-state accommodation and tear film-induced changes after the blink. [33][34][35][36] Obvious abnormalities in accommodation or dry eye were not detected in this study. According to a recent review article from the American Society of Cataract and Refractive Surgery, 37 patients with untreated ocular surface diseases commonly exhibit dry eye, which reduces the repeatability of refractive measurements before surgery, thereby reducing postoperative visual outcomes and patient satisfaction.…”

“…Therefore, we only analyzed the 4-mm diameter data set. Furthermore, the optical or visual performance of the human eye is not static and fluctuates over time, 33 indicating that the reliability of wavefront measurements may be subject to temporal fluctuations. Previous studies with continuous wavefront measurements have reported microfluctuations in steady-state accommodation and tear film–induced changes after the blink.…”

Irregular Astigmatism and Higher-Order Aberrations in Eyes With Dry Eye Disease

“…These measurements revealed an increase in irregular astigmatism and have facilitated further study on how tear film behavior relates to QoV in dry eyes. 4,5 Dry eye is a multifactorial disorder of the tear film and ocular surface that results in discomfort, visual disturbance, tear film instability, and, potentially, ocular surface damage. 6 Therefore, advances in objectively assessing optical quality are of particular importance for better understanding and treating dry eye disease.…”