Presbyopia Eye Diseases Presbyopia
Conditions
Interventions
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.
Sponsors
CooperVision International Limited
Eligibility
Sex/Gender
All
Inclusion criteria
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
Exclusion criteria
Exclusion criteria: 1. Ocular anterior segment infection, inflammation, abnormality, or active disease that would contraindicate contact lens wear 2. Use of systemic or ocular medications for which contact lens wear could be contraindicated as determined by the investigator 3. Monocular participants (only one eye with functional vision) or participants fit with only one lens 4. Any moderate or severe ocular condition observed during the slit-lamp examination at the enrolment visit 5. History of herpetic keratitis, ocular surgery or irregular cornea 6. Known pregnancy or lactation during the study period 7. Enrolment of the investigator or his/her staff, family members of the investigator, family members of the investigator’s staff, or individuals living in the households of these individuals
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| Contact lens decentration measured from a high-speed video taken after 0.5 hours of wear | — |
Secondary
| Measure | Time frame |
|---|---|
| 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 | — |
Countries
England, United Kingdom
Contacts
Public ContactDeborah Moore
Outcome results
None listed