Contrast sensitivity evaluation of DOT spectacle lenses
- Conditions
- Myopia management using contrast management spectacle lensesEye Diseases
- Registration Number
- ISRCTN16801917
- Lead Sponsor
- SightGlass Vision
- Brief Summary
2023 Abstract results in https://iovs.arvojournals.org/article.aspx?articleid=2788812 (added 16/02/2024)
- Detailed Description
Not available
Recruitment & Eligibility
- Status
- Completed
- Sex
- All
- Target Recruitment
- 10
1. Has had a self-reported oculo-visual examination in the last two years
2. Is at least 18 years of age and has full legal capacity to volunteer
3. Has read and understood the informed consent letter
4. Is willing and able to follow instructions and maintain the appointment schedule
5. Is correctable to a visual acuity of 20/40 or better (in each eye) with their habitual vision correction or 20/20 best-corrected
6. Is willing and able to wear contact lenses in the office for testing
7. Spectacle cylinder less than -0.75DC
8. Has clear corneas and no active ocular disease
9. Can tolerate having one eye covered and study procedures
1. Has any systemic disease affecting their ocular health
2. Is using any systemic or topical medications that will affect their ocular health
3. Has any ocular pathology or severe insufficiency of lacrimal secretion (moderate to severe dry eyes) that would affect clear vision when wearing spectacle lenses
4. Is aphakic
Study & Design
- Study Type
- Interventional
- Study Design
- Not specified
- Primary Outcome Measures
Name Time Method Contrast sensitivity measured using the FrACT test at a 4m distance at 8, 12, 6 and 3 cycles per degree under photopic (85cd/m2) conditions with each spectacle lens at one timepoint
- Secondary Outcome Measures
Name Time Method Visual acuities measured using a standard letter chart at a 4m distance under photopic (85cd/m2) conditions with each spectacle lens at one timepoint