It has long been known that the eye’s optical defects i.e., aberrations degrade visual performance especially under dim light condition where the eye pupil increases. The degradation becomes even more dominant in highly aberrated eyes with irregular cornea such as keratoconus and post-refractive surgery ectasia. These aberrations cannot be corrected with conventional spectacles of contact lenses especially in moderate to severe pathologic cases. The wavefront-guided or customized specialty contact lenses can be an effective approach to overcoming the problem, however many of these options are still under development for commercialization and the requirement of full customization increases the cost. We proposed a new method that reduces the eye’s aberrations to improve visual performance. The invention here is to use a slit pinhole that could be implemented into a contact lens (soft and hard), spectacles and potentially an intraocular lens. This idea could also be effective in extending depth of focus, resulting in improving near vision in these patients suffering from presbyopia (age-related near vision loss).