Presbyopia Eye Diseases
Conditions
Interventions
Multifocal contact lenses are prescribed to provide wearers with good vision satisfaction and visual performance using the manufacturer's prescribing routine. This study will investigate two methods o
Sponsors
CooperVision International Limited
Eligibility
Sex/Gender
All
Inclusion criteria
Inclusion criteria: 1. Aged 40 years old and over 2. Have read and understood the Participant Information Sheet 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: 7.1. Distance: 7.1.1. Sphere -6.00D to + 4.00D 7.2.1. Astigmatism 0.00D to -0.75D 7.2. Near Addition: 7.2.1. Established Presbyopes: +1.50D and +1.75D 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 |
|---|---|
| 1. Overall binocular vision satisfaction measured using a 100-point visual analogue scale (VAS) after one week of wear 2 Overall preference measured using a forced choice scale at the completion of the study | — |
Secondary
| Measure | Time frame |
|---|---|
| 1. Mean binocular visual performance measured using timed logMAR mean visual acuity after one week of wear 2. Number of contact lenses needed per participant to determine the contact lens pair to be dispensed | — |
Countries
England, United Kingdom
Contacts
Public ContactDeborah Moore
Outcome results
None listed