Proof-of-Concept for a Novel Optical Aperture Contact Lens in Presbyopia and Keratoconus

Inclusion Criteria: * Age ≥ 18y at time of informed consent. * Provide written Informed Consent. * Being diagnosed in both eyes with: * Keratoconus, without having presbyopia (Group A) OR: Emmetropic (+-0.5 D) presbyopia, without having corneal irregularities (Group B) * Cornea considered to be clinically stable at the discretion of the investigator (e.g. no recent cross linking performed, no current corneal sutures, no corneal sutures recently removed). * Willing to remove current contact lenses (any type) in both eyes for a minimum of 48 hours prior to every study visit. * Able to read Dutch. Exclusion Criteria: * Active ocular infection or inflammation, including infectious keratitis, infectious conjunctivitis or blepharitis with discharge. * Medical history (of ocular pathologies) that might lead to incomplete/incorrect eye surface scan OR wavefront aberrometry, at the discretion of the investigator. * Use of fluorescein in the eye, within 12 hours prior to the PentacamAXL Wave scan. * Contact lens refitting within one month prior to the screening PentacamAXL Wave scan (or planned refitting throughout the study), as this can significantly impact the corneal or scleral surface. * Use of hybrid contact lenses or corneal RGP contact lenses within 3 months prior to (or planned use during) study participation. * Having worn contact lenses (any type) within 48 hours prior to performing the screening Pentacam AXL Wave scan at visit 1. * Clinically significant acute non-infect…