publication Journal Article 2012 Effect of contrast, stimulus density, and viewing distance on multifocal steady-state visual evoked potentials (MSVs) more of publication Enzymatic resistance of corneas crosslinked using riboflavin in conjunction with low energy, high energy, and pulsed UVA irradiation modes 2016 Standard versus accelerated riboflavin–ultraviolet corneal collagen crosslinking: resistance against enzymatic digestion 2015 Effect of contrast, stimulus density, and viewing distance on multifocal steady-state visual evoked potentials (MSVs) 2012