Determine Functions of Pinhole Glasses on the Eyes
PH001
Quantative Analysis of Functional Changes by the Pinhole Glasses
1 other identifier
interventional
30
1 country
1
Brief Summary
Pinhole glasses which is using pinhole effect may induce a functional change on the eyes, including Distance and near visual acuity(DVA, NVA), Pupil size, DOF, Accomodative amplitude, CS, Visual field(VF), Stereopsis.
Trial Health
Trial Health Score
Automated assessment based on enrollment pace, timeline, and geographic reach
participants targeted
Target at below P25 for not_applicable
Started Apr 2014
1 active site
Health score is calculated from publicly available data and should be used for screening purposes only.
Trial Relationships
Click on a node to explore related trials.
Study Timeline
Key milestones and dates
Study Start
First participant enrolled
April 1, 2014
CompletedPrimary Completion
Last participant's last visit for primary outcome
April 1, 2014
CompletedStudy Completion
Last participant's last visit for all outcomes
April 1, 2014
CompletedFirst Submitted
Initial submission to the registry
April 4, 2014
CompletedFirst Posted
Study publicly available on registry
April 11, 2014
CompletedApril 11, 2014
April 1, 2014
Same day
April 4, 2014
April 9, 2014
Conditions
Outcome Measures
Primary Outcomes (1)
Distance and near visual acuity(DVA, NVA)
Check distance(4m) and near(40cm) visual acuity using Snellen chart, Visual Acuity chart 2000, respectively. At 1 week, cheked with wearing the pinhole glasses (Trayner Pinhole Glasses, Trayner Glasses, U.K.)
Change from baseline at 1 week
Secondary Outcomes (6)
Pupil size
Change from baseline at 1 week
Depth of focus
Change from baseline at 1 week
Accomodation
Change from baseline at 1 week
Visual field
Change from baseline at 1 week
Contrast sensitivity
Change from baseline at 1 week
- +1 more secondary outcomes
Study Arms (1)
Pinhole glasses
EXPERIMENTALAll subjects perform ophthalmic examinations before and after the pinhole glasses (Trayner Pinhole Glasses, Trayner Glasses, U.K.)
Interventions
Wearing the pinhole glasses (Trayner Pinhole Glasses, Trayner Glasses, U.K.)
Eligibility Criteria
You may qualify if:
- Age : between 20 and 50 years old
- Visual acuity : correctable distant and near visual acuity by glasses up to 20/20
- Others : Normal intraocular pressure, optic discs with a healthy appearance, and normal ocular alignment.
You may not qualify if:
- History of systemic or topical medication that might affect accommodation
- Others : Corneal pathologic features, previous ocular surgery, glaucomatous optic discs, glaucoma, cataracts of grade II or greater, vitreous opacity, or retinal abnormalities that might limit the accuracy of test.
Contact the study team to confirm eligibility.
Sponsors & Collaborators
Study Sites (1)
Department of Ophthalmology, Chung-Ang University School of Medicine, Chung-Ang University Hospital
Seoul, Seoul, 156-755, South Korea
Related Publications (1)
Kim WS, Park IK, Chun YS. Quantitative analysis of functional changes caused by pinhole glasses. Invest Ophthalmol Vis Sci. 2014 Aug 12;55(10):6679-85. doi: 10.1167/iovs.14-14801.
PMID: 25118263DERIVED
Study Officials
- PRINCIPAL INVESTIGATOR
WonSoo Kim, M.D.
Ophthalmology, Chung Ang University Hospital
Study Design
- Study Type
- interventional
- Phase
- not applicable
- Allocation
- NA
- Masking
- NONE
- Purpose
- BASIC SCIENCE
- Intervention Model
- SINGLE GROUP
- Sponsor Type
- OTHER
- Responsible Party
- PRINCIPAL INVESTIGATOR
- PI Title
- WonSoo Kim
Study Record Dates
First Submitted
April 4, 2014
First Posted
April 11, 2014
Study Start
April 1, 2014
Primary Completion
April 1, 2014
Study Completion
April 1, 2014
Last Updated
April 11, 2014
Record last verified: 2014-04