Scientists from Bar-Ilan University in Israel have developed a new technique that significantly reduces the halo effect that is generated when using contact and intra-ocular lenses and looking at bright point sources in dark conditions.
Presbyopia is characterized by the inability to focus on nearby objects as a result of natural aging. Corrective lenses used to address presbyopia often lead to a halo effect. It is mostly experienced at night and it can make driving at night unsafe or even impossible in extreme cases.
Prof. Zeev Zalevsky, head of the Electro-Optics study program of the Faculty of Engineering at the university, explained that their solution involved smoothening the surface structure of a contact lens or an intra-ocular lens.
The study was published in Optics Communication.