Quality of Vision of Presbyopic via Progressive Additional Lens (PALs)

Abstract

The number of presbyopia with inadequate correction is increasing worldwide which surely decreased the visual satisfaction. A survey was conducted to study the level of vision satisfaction between the quality of vision and symptoms reported by progressive addition lens (PALs). Sixty questionnaires were mailed to the (PALs) wearers aged between 40 years and above from Universiti Teknologi Mara (UiTM) Vision Care. The strongest correlation was between the quality of vision at intermediate viewing with total satisfaction on seeing grocery shelves and computer screen p<0.001. PALs wearers priority and needs should be considered in selecting the appropriate lens design for required tasks.Keywords: level of satisfaction; quality of vision; multifocal lens; progressive additional lens.eISSN 2398-4279 © 2018. The Authors. Published for AMER ABRA cE-Bs by e-International Publishing House, Ltd., UK. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/). Peer–review under responsibility of AMER (Association of Malaysian Environment-Behaviour Researchers), ABRA (Association of Behavioural Researchers on Asians) and cE-Bs (Centre for Environment-Behaviour Studies), Faculty of Architecture, Planning & Surveying, Universiti Teknologi MARA, Malaysia. DOI: https://doi.org/10.21834/ajqol.v3i13.171

Optimization method for freeform progressive addition lenses using the coincident degree of weight distributions for power deviation and astigmatism

“…They are designed to provide continuous vision at all viewing distances, ensuring optimal dioptric power for presbyopic individuals. The design aims for smooth and uninterrupted vision without any visible lines of demarcation [7,8]. Computational methods for designing PALs can be divided into direct analytical method [9,10] and indirect numerical method [11][12][13].…”