A Comparison of Two Contact Lenses
Trial Snapshot
- Phase
- Not Applicable
- Status
- Completed
- Enrollment
- 40
- Locations
- 1
- Primary Endpoint
- Patient-reported Comfort at at the Manufacturer's Recommended Lens Replacement Timeframe of 2-weeks (Senofilcon A) or 4-weeks (Balafilcon A).
Study Overview
Brief Summary
This study seeks to evaluate the clinical and subjective performance of two established soft contact lenses.
Study Design
- Study Type
- Interventional
- Allocation
- Randomized
- Intervention Model
- Crossover
- Primary Purpose
- Treatment
- Masking
- Single (Participant)
Eligibility Criteria
- Ages
- 18 Years to — (Adult, Older Adult)
- Sex
- All
- Accepts Healthy Volunteers
- No
Inclusion Criteria
- •They are of legal age (18 years) and capacity to volunteer.
- •They understand their rights as a research subject and are willing to sign a Statement of Informed Consent.
- •They are willing and able to follow the protocol.
- •They would be expected to attain at least 6/9 (20/30) in each eye with the study lenses.
- •They are able to wear contact lenses with a back vertex power of -1.00 to -6.00DS.
- •They have a maximum of 1.00D of refractive astigmatism (i.e. ≤ 1.00 DC).
- •They have successfully worn contact lenses within six months of starting the study.
Exclusion Criteria
- •They have an ocular disorder which would normally contra-indicate contact lens wear.
- •They have a systemic disorder which would normally contra-indicate contact lens wear.
- •They are using any topical medication such as eye drops or ointment.
- •They are aphakic.
- •They have had corneal refractive surgery.
- •They have any corneal distortion resulting from previous hard or rigid lens wear or has keratoconus.
- •They are pregnant or lactating.
- •They have grade 2 or greater of any of the following ocular surface signs: corneal oedema, corneal vascularisation, corneal staining, tarsal conjunctival changes or any other abnormality which would normally contraindicate contact lens wear.
- •They have any infectious disease (e.g. hepatitis) or any immunosuppressive disease (e.g. HIV).
- •They have diabetes.
- •They have taken part in any other clinical trial or research, within two weeks prior to starting this study.
Arms & Interventions
senofilcon A/balafilcon A
senofilcon A silicone hydrogel contact lens worn during first 4-week period, balafilcon A silicone hydrogel contact lens worn during the second 4-week period. Senofilcon A lenses worn daily on a 2-week replacement schedule; balafilcon A lenses worn daily on a 4-week replacement schedule. Lens replacement conducted in-office in a masked process.
Intervention: senofilcon A (Device)
senofilcon A/balafilcon A
senofilcon A silicone hydrogel contact lens worn during first 4-week period, balafilcon A silicone hydrogel contact lens worn during the second 4-week period. Senofilcon A lenses worn daily on a 2-week replacement schedule; balafilcon A lenses worn daily on a 4-week replacement schedule. Lens replacement conducted in-office in a masked process.
Intervention: balafilcon A (Device)
balafilcon A/senofilcon A
balafilcon A silicone hydrogel contact lens worn worn during first 4-week period, senofilcon A silicone hydrogel contact lens worn during the second 4-week period. Senofilcon A lenses worn daily on a 2-week replacement schedule; balafilcon A lenses worn daily on a 4-week replacement schedule. Lens replacement conducted in-office in a masked process.
Intervention: senofilcon A (Device)
balafilcon A/senofilcon A
balafilcon A silicone hydrogel contact lens worn worn during first 4-week period, senofilcon A silicone hydrogel contact lens worn during the second 4-week period. Senofilcon A lenses worn daily on a 2-week replacement schedule; balafilcon A lenses worn daily on a 4-week replacement schedule. Lens replacement conducted in-office in a masked process.
Intervention: balafilcon A (Device)
Outcomes
Primary Outcomes
Patient-reported Comfort at at the Manufacturer's Recommended Lens Replacement Timeframe of 2-weeks (Senofilcon A) or 4-weeks (Balafilcon A).
Time Frame: after 4 weeks of lens wear
Subjective rating of overall comfort using a 0 through 5 scale. 0=n/a, 1=poor, 2=fair, 3=good, 4=very good, 5=excellent. Scores from 2-week and 4-week visits were combined for final values.
Secondary Outcomes
No secondary outcomes reported