None listed
Conditions
Brief summary
• To assess changes in axial length of myopic eyes to short-term (60 mins) wear of multifocal and myopia control spectacle lenses. • To assess the wearability to short-term wear of multifocal and myopia control spectacle lenses. Study Hypothesis: The changes in length of an eye when wearing prototype multifocal lenses are no different than when wearing commercially available lenses for controlling shortsightedness. Prototype multifocal lenses provides the same visual comfort and wearability as commercially available lenses for controlling shortsightedness.
Interventions
• Multifocal spectacle Lens type 3: Clear central zone (up to 9mm);peripheral zone with alternating rings of +5.0D and plano power presenting simultaneous defocus (Coaxial design)
• Multifocal spectacle Lens type 4 : Clear central zone (up to 9mm); peripheral zone with alternating rings of -5.0D and plano power presenting simultaneous defocus (Coaxial design)
• Multifocal spectacle Lens type 5: Clear central zone (up to 9mm); peripheral zone with alternating rings of +5.0D and plano power pre
• Multifocal spectacle Lens type 3: Clear central zone (up to 9mm);peripheral zone with alternating rings of +5.0D and plano power presenting simultaneous defocus (Coaxial design) • Multifocal spectacle Lens type 4 : Clear central zone (up to 9mm); peripheral zone with alternating rings of -5.0D and plano power presenting simultaneous defocus (Coaxial design) • Multifocal spectacle Lens type 5: Clear central zone (up to 9mm); peripheral zone with alternating rings of +5.0D and plano power presenting simultaneous defocus (Non-coaxial design) • Multifocal spectacle Lens type 6: Clear central zone (up to 9mm); peripheral zone with alternating rings of -5.0D and plano power presenting simultaneous defocus (Non-co-axial design) This is a prospective, randomized, non-dispensing, cross-over short-term wear (60 mins) clinical trial The participants will be assigned to wear each of the lens type once during the study. Each of the lenses will be worn for 60 minutes once per day, Each participant will wear 6 different lenses (2 control and 4 intervention lenses) on six different days with a minimum washout period of 24 hours between study visits. The participant will wear these lenses over 60 minutes under the supervision of a qualified optometrist,
Sponsors
Brien Holden Vision Institute
Study design
Allocation
Randomised controlled trial
Intervention model
Crossover
Primary purpose
Treatment
Masking
Open (masking not used)
Eligibility
Sex/Gender
All
Age
18 Years to 30 Years
Healthy volunteers
No
Inclusion criteria
• Age ranging from 18-30 years; • Non-cycloplegic spherical equivalent refractive error ranging from -0.75D to –5.00D; • Best corrected visual acuity of 20/30or better in both eyes; • Normal ocular health (No ocular disease) • No history of ocular surgery; • No manifest squint or intermittent tropias; • Astigmatism less than 1.00 D; • Anisometropia of not more than 1.00 D; • Normal general health. • No current use of ocular or systemic medications excepting use of lubricating or anti-allergic eye drops.
Exclusion criteria
• Use of rigid contact lens wear • Any prior myopia control treatment
Outcome results
None listed