Single vision vs toric contact lens centration on the eye study

INTERVENTION: Each participant wears the two contact lenses in a random order for a half‐hour period, after which the contact lens fitting measurements and comfort measurements are carried out. 1. Measurement of contact lens decantation (horizontal and vertical) from the centre of the pull (mm). The measurement is performed in primary gaze and reading gaze 2. Lens centration and lens movement classification on a five‐point scale 3. Contact lens comfort rating on Likert scale CONDITION: Presbyopia ; Eye Diseases ; Presbyopia PRIMARY OUTCOME: Contact lens decentration measured from a high‐speed video taken after 0.5 hours of wear SECONDARY OUTCOME: ; 1. Lens centration measured on a four‐point scale by investigator using a slit lamp biomicroscope after 0.5 hours of wear; 2. Lens movement measured on a five‐point scale by investigator using a slit lamp biomicroscope after 0.5 hours of wear; 2. Comfort rating measured by participant using a computer‐based six‐point Likert scale after 0.5 hours of wear; INCLUSION CRITERIA: 1. 40 or more years of age 2. Have read and understood the Participant Information Sheet in English 3. Have read, signed and dated the Informed Consent 4. Best corrected visual acuity of at least 20/25 in each eye 5. Have normal eyes with the exception of the need for visual correction 6. Current multifocal contact lens wearer 7. Spectacle refraction: Distance: Sphere: ‐6.00D to + 4.00DS Astigmatism: ‐0.50DC to ‐1.25DC in each eye Near Addition: +0.75D to +2.50D 8. Be willing and able to adhere to the instructions set in the clinical protocol and maintain the appointment schedule