This study, in collaboration with the lab of Prof, Francesco Di Russo at the University of Rome “Foro Italico”, aims to explore perceptual mechanisms that can promote a successful adaptation to multifocal contact lenses in presbyopic wearers. The study is carried out by an electrophysiology paradigm already used in the study of monovision [Zeri F et al (2018) Immediate cortical adaptation in visual and non‐visual areas functions induced by monovision. The Journal of physiology 596(2):253].
When these lenses are fitted, spherical aberration is introduced and this causes an overlap of on focus images from far and near objects, the image of interest must be “selected” by the visual system. It is believed that success of an application of multifocal contact lenses in presbyopes depends on the adaptation (on a perceptual basis) to this condition.
The aim of the study is to investigate these perceptual adaptations which take place in the brain. The knowledge of these mechanisms and their individual variability could lead to the identification of functional indicators related to a successful application, that can be useful in the selection of the presbyopic subject to be successfully corrected with multifocal contact lenses.