Non-dispensing Fitting Study Comparing the Clinical Performance Hydrogel Sphere Design Contact Lenses.
Myopia
About this trial
This is an interventional other trial for Myopia
Eligibility Criteria
Inclusion Criteria:
A person is eligible for inclusion in the study if he/she:
- Is between 18 and 40 years of age (inclusive).
- Has had a self-reported visual exam in the last two years.
- Is an adapted soft CL (Contact Lens) wearer.
- Has a CL spherical prescription between - 1.00 and - 6.00 (inclusive)
- Has a spectacle cylinder up to 0.75D (Diopters) in each eye.
- Can achieve best corrected spectacle distance visual acuity of 20/25 (0.10 logMAR) or better in each eye.
- Can achieve a distance visual acuity of 20/30 (0.18 logMAR) or better in each eye with the study contact lenses.
- Has clear corneas and no active ocular disease.
- Has read, understood and signed the information consent letter.
- Patient contact lens refraction should fit within the available parameters of the study lenses.
- Is willing to comply with the wear schedule.
- Is willing to comply with the visit schedule.
Exclusion Criteria:
A person will be excluded from the study if he/she:
- Has never worn contact lenses before.
- Currently wears rigid gas permeable contact lenses.
- Has a history of not achieving comfortable CL wear (5 days per week; > 8 hours/day)
- Has a CL prescription outside the range of - 1.00 to - 6.00D
- Has a spectacle cylinder ≥1.00D of cylinder in either eye.
- Has contact lens best corrected distance vision worse than 20/25 (0.10 logMAR) in either eye.
- Presence of clinically significant (grade 2-4) anterior segment abnormalities.
- Presence of ocular or systemic disease or need of medications which might interfere with contact lens wear.
Slit lamp findings that would contraindicate contact lens wear such as:
- Pathological dry eye or associated findings
- Pterygium, pinguecula, or corneal scars within the visual axis
- Neovascularization > 0.75 mm in from of the limbus
- Giant papillary conjunctivitis (GPC) worse than grade 1
- Anterior uveitis or iritis (past or present)
- Seborrheic eczema, Seborrheic conjunctivitis
- History of corneal ulcers or fungal infections
- Poor personal hygiene
- Has a known history of corneal hypoesthesia (reduced corneal sensitivity)
- Has aphakia, keratoconus or a highly irregular cornea.
- Has Presbyopia or has dependence on spectacles for near work over the contact lenses.
- Has undergone corneal refractive surgery.
- Is participating in any other type of eye related clinical or research study.
Sites / Locations
- Optometry Clinic, National Autonomous University
Arms of the Study
Arm 1
Arm 2
Arm 3
Arm 4
Experimental
Experimental
Experimental
Experimental
filcon IV I (BC 8.6) / ocufilcon D (pair one)
filcon IV I (BC 8.7) / ocufilcon D (pair two)
methafilcon A (BC 8.6) / ocufilcon D (pair three)
methafilcon A (BC 8.7) / somofilcon A (pair four)
Participants were randomized to a test and control lens for each pair in a contralateral design.
Participants were randomized to a test and control lens for each pair in a contralateral design.
Participants were randomized to a test and control lens for each pair in a contralateral design.
Participants were randomized to a test and control lens for each pair in a contralateral design.