None listed
Conditions
Brief summary
The purpose of this prospective, randomized crossover trial is to understand how Precision 1 Toric contact lenses impact on functional vision with digital devices, in comparison to functional visual performance with spherical equivalent contact lenses (Precision 1 sphere) in healthy participants with low to moderate levels of astigmatism.
Interventions
The intervention is a soft disposable contact lens that provides an optical correction for astigmatism. The lenses will be fit to individual participants' eyes by an experienced (>10 years) research optometrist, to provide optimal correction for their low to moderate astigmatic refractive errors. The astigmatism correcting lens will be worn in both eyes for a single 60-minute session in a research laboratory/clinical facility. The order of lens wear (intervention/control) will be randomized.
The intervention is a soft disposable contact lens that provides an optical correction for astigmatism. The lenses will be fit to individual participants' eyes by an experienced (>10 years) research optometrist, to provide optimal correction for their low to moderate astigmatic refractive errors. The astigmatism correcting lens will be worn in both eyes for a single 60-minute session in a research laboratory/clinical facility. The order of lens wear (intervention/control) will be randomized. All participants will wear the intervention and control lenses in separate sessions on different days at least 24 hours apart (i.e. crossover study design).
Sponsors
Queensland University of Technology
Study design
Allocation
Randomised controlled trial
Intervention model
Crossover
Primary purpose
Treatment
Masking
Blinded (masking used) (Subject)
Eligibility
Sex/Gender
All
Age
18 Years to 30 Years
Healthy volunteers
Yes
Inclusion criteria
Healthy adults with normal corrected visual acuity in each eye Refractive astigmatism between -0.50 and -1.50 D Spherical refractive error of between 0.00 and -6.00 D Normal binocular vision and accommodative function Prior history of successful soft contact lens wear
Exclusion criteria
History of eye disease, surgery, or injury Contraindications to contact lens wear Signs or symptoms of dry eye or ocular surface disease Regular rigid contact lens wear Unable to achieve a satisfactory lens fit with the study contact lenses
Outcome results
None listed