Presbyopia vision correction using multifocal contact lenses Eye Diseases Presbyopia
Conditions
Interventions
Multifocal contact lenses are used in wearers with various levels of astigmatism. It is important to understand the effect of astigmatism on visual performance of multifocal contact lenses. In this s
Sponsors
CooperVision (United States)
Eligibility
Sex/Gender
All
Inclusion criteria
Inclusion criteria: 1. At least 40 years old 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: -6.00DS to + 4.00DS Astigmatism: a. -0.50 DC in both eyes or b. -0.75 DC to -1.25 DC in one eye Near Addition: +0.75 D to +2.50 D 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. Newly prescribed use of some 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 |
|---|---|
| Visual performance (overall binocular and monocular) measured using LogMar charts at approximately 30 mins after the contact lenses are inserted | — |
Secondary
| Measure | Time frame |
|---|---|
| Visual satisfaction (overall binocular and monocular) measured using LogMar charts at approximately 30 mins after the contact lens are inserted | — |
Countries
United Kingdom
Contacts
Public ContactDeborah Moore
Outcome results
None listed