This study aims to compare the clinical performance of the somfilcon A, nelfilcon A II 2 and omafilcon A II 2 daily disposable contact lenses.
This will be a randomised, subject-masked, crossover, bilateral study, controlled by cross comparison. Fifty subjects will use each lens type for a week in random sequence. Follow-up visits for each lens will be performed after one week of wear. Lenses will be worn on a daily wear, daily disposable wear schedule.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
SINGLE
Enrollment
51
Eurolens Research - The University of Manchester
Manchester, United Kingdom
Ocular Physiology
Ocular physiology assessment of by biomicroscopy (Scale 0-4, 0.25 steps, 0=normal, 4=severe).
Time frame: 1 week
Lens Fit - Horizontal Centration
Horizontal centration will be assessed for the following regions: extremely nasal, slightly nasal, optimum, slightly temporal, extremely temporal.
Time frame: 1 week
Lens Fit - Vertical Centration
Vertical centration will be assessed for the following regions: extremely nasal, slightly nasal, optimum, slightly temporal, extremely nasal.
Time frame: 1 week
Lens Fit - Corneal Coverage
Corneal coverage will be assessed for the following regions: extremely nasal, slightly nasal, optimum, slightly temporal, extremely nasal.
Time frame: 1 week
Lens Fit - Movement
Lens movement assessed using the following evaluations: extremely inadequate, slightly inadequate, optimum, slightly excessive, extremely excessive.
Time frame: 1 week
Lens Surface - Deposition
Lens surface will be assessed using Grades 0-4, 0=normal, 1=trace, 2=mild, 3=moderate, 4=severe
Time frame: 1 week
Lens Surface - Wettability
Lens wettability will be assessed using Grades 0-4, 0=normal, 1=trace, 2=mild, 3=moderate, 4=severe
Time frame: 1 week
Visual Acuity
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Visual acuity will be assessed by LogMAR.
Time frame: 1 week