View clinical trials related to Contact Lens.
Filter by:Purpose: Numerous studies have proven that emmetropization in young animals including humans is regulated by visual input. It has long been hypothesized that peripheral myopic defocus may act as a stop signal to reduce myopia progression and axial elongation. As such, multifocal soft contact lenses (MFCLs) have been utilized for myopia control in school-aged children, with variable efficacies. One potential explanation is that the actual peripheral myopic defocus an eye experiences during MFCL wear may not be identical to the Add power and not sufficient to reduce myopia progression. Our study investigated and compared the peripheral power profiles of myopic eyes when they were uncorrected and wore single vision contact lenses (SVCLs) and MFCLs of different Add powers. Methods: Subjects with -1.00 D to -10.00 D of myopia (SE, determined with manifest refraction) were custom fit with both single vision (SV) and MFCLs (+2.00 and +4.00 D Add; provided by Specialeyes) in both eyes. These Specialeyes MFCLs had an aspheric design with a standard total optical zone of 8.0mm. Cycloplegic central autorefraction was conducted with both Grand Seiko WAM-5500 open-field auto-refractor (Grand Seiko Co Ltd) and OPD OPD-Scan III Wavefront Aberrometer (Marco) on the subjects in the following conditions: (1) no CLs, (2) SVCLs, (3) MFCLs (+2.00D Add), and (4) MFCLs (+4.00D Add). Relative peripheral power profiles were measured using the OPD under the same 4 conditions after cycloplegia. Data in the right eye was used for analysis.
This is a cross-cultural adaptation, evaluation and validation study of the 8-item Contact Lens Dry Eye Questionnaire (CLDEQ-8) among soft contact lens wearers in China.
The purpose of this study is to assess the wear experience of existing wearers of a monthly replacement contact lens after they have been fit with a daily disposable contact lens that has water surface treatment.
To evaluate the wear experience of current monthly replacement contact lens wearers after they have been fit into a daily disposable contact lens.
This study is evaluating the wear experience of a daily toric contact lens after 10, 12, 14, and 16 hours of lens wear.
This study is evaluating the wear experience of a daily contact lens after 10, 12, 14, and 16 hours of lens wear.
To evaluate the wear experience of current two-week contact lens wearers after they have been fit into a daily disposable contact lens. This is a single arm, non-comparative study.
The most common reason for contact lens discontinuation is contact lens discomfort. The investigators believe that inflammation plays a role in contact lens discomfort and the use of lifitegrast 5% ophthalmic solution may reduce end of the day contact lens discomfort. This study will enroll 21 contact lens users who will be receiving lifitegrast 5% ophthalmic solution and monitor the contact lens discomfort for a 8 week period while.