Presbyopia vision correction using multifocal contact lenses Eye Diseases Presbyopia
Conditions
Interventions
Multifocal contact lens fitting for dominant and non dominant eye based on best sphere spectacle correction and over-refractions. Visual performance will be measured using letter charts and visual sat
Sponsors
CooperVision Inc. (USA)
Eligibility
Sex/Gender
All
Inclusion criteria
Inclusion criteria: There are no requirements as to participant race, gender or occupation. In order to be enrolled, each participant shall meet the following criteria: 1. At least 40 years old 2. Have read and understood the Participant Information Sheet 3. Have read, signed and dated the Informed Consent 4. Current multifocal contact lens wearer 5. Spectacle refraction: Distance: Sphere: -6.00D to + 6.00D Astigmatism: 0.00D to -0.75D Near Addition: Low Add: +0.75D to +1.25D Mid Add: +1.50D & +1.75D High Add: +2.00D to +2.50D 6. Best corrected visual acuity of at least 20/30 in each eye 7. Have normal eyes with the exception of the need for visual correction 8. Be willing and able to adhere to the instructions set in the clinical protocol and maintain the appointment schedule
Exclusion criteria
Exclusion criteria: To be eligible as a participant, each candidate shall be free of any ocular or medical condition that may affect the results of this study. The following are specific criteria that exclude a candidate from enrolment in this study: 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 contact 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 8. Participation in any clinical trial within 30 days of the enrolment visit
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| High contrast monocular and binocular visual acuities at distance (4 m), intermediate (67 cm) and near (40 cm) measured using letter charts in LogMAR during test visit | — |
Secondary
| Measure | Time frame |
|---|---|
| Visual satisfaction measured using visual analog scale (0-100) during test visit | — |
Countries
United Kingdom
Contacts
Public ContactTrisha Patel
Outcome results
None listed