Plain English Summary
Background and study aims
To test the performance of CV Multifocal (MF) contact lens (CL) in a real world setting, the lenses need to be worn by wearers representing different level of near vision needs and compared with a MF CL that is widely used on the market (control). The aims of this study are to compare CV MF CL with a control for overall satisfaction, visual performance, and ease of fit.
Who can participate?
Adults who are at least 40 years old, who have healthy eyes and wear contact lenses
What does the study involve?
There are up to four study visits over a three-week period. The first visit is screening and enrollment. Following that at the second visit, participants are fitted with both study lenses according to the fitting guide and the investigator assesses the lens fit and measures vision with the lenses. Participants are asked to complete a short questionnaire. The first MF CL is dispensed (test or control allocated by chance) and worn on a daily disposable basis for a week. At the third visit, the first lens type is evaluated and then the second lens type is dispensed. The same routine as the first lens type is followed for the second type of MF CL. At the fourth visit, the second lens type is evaluated and then the participant leaves the study.
What are the possible benefits and risks of participating?
There might not be direct benefits to the participants. Participants will receive an examination of their eyes and may have the opportunity to try different types of soft MF CL at no cost. Due to the nature and duration of the study, the risks of participating are considered minimal. All the assessments are safe, and none present any increased risk compared with routine assessment. Participants already wear contact lenses. The risks of taking part in the study are no greater than those associated with wearing their own contact lenses. The study lenses are approved marketed daily disposable lenses and there will be no lens care system used.
Where is the study run from?
Ocular Technology Group - International (UK)
When is the study starting and how long is it expected to run for?
August 2018 to August 2019
Who is funding the study?
CooperVision Inc. (USA)
Who is the main contact?
Ms Trisha Patel
CV 18-56/OTG-i ID18-43
Clinical validation multisite study of CV multifocal contact lenses
The primary hypothesis to be tested will be that overall visual satisfaction of CV MF is non-inferior to that of control lens; overall satisfaction will be measured in term of overall visual acceptance.
North West - Greater Manchester West Research Ethics Committee, Barlow House, 3rd Floor, 4 Minshull Street Manchester. M1 3DZ, Tel: +44 (0)207 104 8021, Email: email@example.com, 24/10/2018, REC Ref: 18/NW/0705
Prospective one-week dispensing randomized two-way cross over subject masked study
Primary study design
Secondary study design
Randomised cross over trial
Patient information sheet
Not available in web format, please use contact details to request a participant information sheet.
Presbyopia, multi-focal contact lenses, vision
It is important that the multifocal contact lenses prescribed for an invididual perform as intended and provide the wearers with good overall satisfaction, visual performance and the prescribing routine was simple and easy to follow. In this study the overall clinical behavior of CV MF contact lens is compared to that the most commonly contact lens of the same type to identify relative subjective benefits. Participants will use both test (CV MF) and control (1-DAY ACUVUE® MOIST Multifocal 1DAVM) in a randomized sequence for one week each. Measurements will include distance and near visual acuity, lens fitting characteristics and subjective responses using questionnaires.
Primary outcome measure
Overall subjective binocular visual satisfaction score on a 100-point Visual Analog Scale (VAS) at dispensing and after one week wear
Secondary outcome measures
1. Binocular visual acuity measurements using LogMAR charts after 1 week wear
2. The number of contact lenses needed per eye to determine the contact lens to be dispensed at dispensing visit
Overall trial start date
Overall trial end date
Reason abandoned (if study stopped)
Participant 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. 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 + 4.00D
Astigmatism: 0.00D to -0.75D
Near Addition: +0.75D to +2.50D in three groups:
Emerging Presbyopes: +0.75D to +1.25D
Established Presbyopes: +1.50D and +1.75D
Advanced presbyopes: +2.00D to +2.50D
8. Be willing and able to adhere to the instructions set in the clinical protocol and maintain the appointment schedule
Target number of participants
Up to 150 participants
Participant exclusion criteria
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 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
Recruitment start date
Recruitment end date
Countries of recruitment
Trial participating centre
Ocular Technology Group - International
66 Buckingham Gate
CooperVision Inc. (USA)
5870 Stoneridge Drive
United States of America
Funding Body Type
Funding Body Subtype
Results and Publications
Publication and dissemination plan
Conference presentation, journal publication. Details to be confirmed at a later date.
IPD sharing statement
The data sharing plans for the current study are unknown and will be made available at a later date.
Intention to publish date
Participant level data
To be made available at a later date
Basic results (scientific)