Contact Lens Performance Novel Endpoint Contact Lens Comparison
Research type
Research Study
Full title
CONTACT LENS PERFORMANCE NOVEL ENDPOINTS CONTACT LENS COMPARISON
IRAS ID
347931
Contact name
Michel Guillon
Contact email
Sponsor organisation
Ocular Technology Group-International
ISRCTN Number
ISRCTN65886044
Duration of Study in the UK
0 years, 6 months, 1 days
Research summary
In routine clinical practice vision is measured using letter charts known as Snellen letter charts. The charts made up of black letters on a white background are not very sensitive at detecting differences in vision between contact lenses very different levels of vision satisfaction.
A better testing method needs to be found changes little from Snellen testing method. OTG-i has developed a test method that is similar, being based on black letters on a white background. The improvements are the use of the same letters at all vision levels and equal steps in the increase in difficulty between the different lines of vision.
Contact lens comfort and vision depend upon many factors, an important is how well the tear film wets the surface of the contact lens. A novel method measuring contact lens coverage by the tear film has been developed. Such method may give some additional information of the reason for the differences in vision between different contact lenses.
The rationale of the study is to test whether a difference in vision can be measured with the new vision testing method between two contact lens types with different surface properties and if such differences are linked to differences in contact lens coverage by the tear film.
The study will involve three visits, the first visit to enroll the participants , fit them with the study contact lenses and familiarise them with the tests. The other two visits will follow the same routine, the participants will be fitted with one of the two study contact lenses at each visit. Vision will be measured and the tear film will be video recorded. The selection of the contact lens type to use at each visit will be random (by change like tossing a coin).REC name
North East - Newcastle & North Tyneside 1 Research Ethics Committee
REC reference
24/NE/0168
Date of REC Opinion
16 Sep 2024
REC opinion
Favourable Opinion