One of the worst things about multifocal contact lenses is that they increase the amount of aberrations that patients experience. The many reasons for this include pupil size problems, decentration of the lens, and altered tear film in a population more prone toward dry eye. Although practitioners certainly have not solved all of the problems, they are getting closer and closer.
READ more: https://www.clspectrum.com/newsletters/contact-lenses-today/july-1,-2018