Chief Supervisor

Prof. Kee Chea-su

Project Title

Synopsis

In many nations worldwide, other highly prevalent refractive deficits affect their population even before they become presbyopic. Myopia is one of the most prevalent eye health problems worldwide, with a frequency of 10-30% in several adult populations and 80-90% in some parts of East and Southeast Asian cities including Hong Kong. Astigmatism is another common refractive error, frequently coexists with myopia, that affects 30% to 60% of adults in Asia. With the natural aging process of the eye’s refractive components, the presbyopes with myopic-astigmatism suffer from additional structural and functional threats when they approach 40 years of age or even younger. As a consequence, their daily visual quality and quality of life are seriously affected in the absence of ophthalmic aids. The poor visual quality suffered by this population may amplify with the popularity of handheld digital devices and the increased time spent on near-works. Although wearing spectacle lenses is the most accessible treatment for presbyopes with myopic-astigmatism, how the eye-lens system can be optimized to enhance their visual quality remains unclear. This study aims to enhance the visual quality of presbyopes with myopic-astigmatism by optimizing the visual performance of the eye-lens system for central and peripheral vision.