Presbyopia multifocal contact lens fitting Eye Diseases Presbyopia
Conditions
Interventions
Each participant uses all 3 contact lenses in a random order for a 2 hour period, after which the contact lens fitting measurement and comfort measurement are being carried out.
1. Me
Sponsors
Cooper Vison Inc. (USA)
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 contact lens wearer 7. Spectacle refraction: Distance: Sphere: -6.00D to + 4.00D Astigmatism: 0.00DC to -0.75DC Near Addition: +0.75D to +1.25D 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 (within the past 30 days) use of some systemic medications (such as antihistamines, decongestants, diuretics, muscle relaxants, tranquilizers, stimulants, anti-depressants, anti-psychotics, oral contraceptives) or new prescription eyedrops which is not rewetting/lubricating eyedrops 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 is measured from high speed video taken after 2 h of wear | — |
Secondary
| Measure | Time frame |
|---|---|
| Measured after 2 h of wear: 1. Lens centration rating on a 5 point scale by investigator using a slit lamp biomicroscope 2. Lens movement rating on a 5 point scale by investigator using a slit lamp biomicroscope 2. Comfort rating by participant using a computer based 100 point VAS scale | — |
Countries
United Kingdom
Contacts
Public ContactDeborah Moore
Outcome results
None listed