Comparison of Objective and Subjective Changes Induced by Multiple Pinhole Glasses and Single Pinhole Glasses

NCT ID: NCT02572544

Last Updated: 2015-10-09

Basic Information

• Recruitment Status: UNKNOWN
• Clinical Phase: NA
• Total Enrollment: 30 participants
• Study Classification: INTERVENTIONAL
• Study Start Date: 2015-10-31

Brief Summary

Purpose of this study is to compare the ocular functional changes including pupil size, visual acuity, depth of focus, accommodative amplitude, visual field, contrast sensitivity, and stereopsis induced by multiple and single pinhole glasses, in addition, to check reading speed and survey for ocular discomfort after using both pinhole glasses.

Conditions

Functional Vision Changes

Study Design

• Allocation Method: NA
• Intervention Model: SINGLE_GROUP
• Primary Study Purpose: BASIC_SCIENCE
• Blinding Strategy: NONE

Study Groups

Participants

All participants perform all exams under 3 conditions, that is baseline, single pinhole glasses, and multiple pinhole glasses

Group Type: EXPERIMENTAL

Trayner Pinhole Glasses (Trayner Glasses, Ivybridge Devon, U.K.)

Intervention Type: DEVICE

Wearing multiple and single pinhole glasses

Interventions

Trayner Pinhole Glasses (Trayner Glasses, Ivybridge Devon, U.K.)

Wearing multiple and single pinhole glasses

Intervention Type: DEVICE

Eligibility Criteria

Inclusion Criteria

1. age between 20 and 45 years;

2. spherical equivalents (SE) within ± 6.0 diopters (D);

3. correctable distant and near visual acuity by glasses up to 20/20;

4. normal intraocular pressure with normal optic disc appearance;

5. normal ocular alignment.

Exclusion Criteria

1. disturbance of accommodation due to any reasons such as an Adie's pupil, Parkinson's disease, a history of previous ocular surgery or trauma, and a history of systemic or topical medication that might affect accommodation;

2. corneal pathologic features;

3. glaucoma;

4. cataracts of grade II or greater by the Lens Opacities Classification System III (LOCS III);

5. vitreous and retinal abnormalities that might limit the accuracy of testing.

• Minimum Eligible Age: 20 Years
• Maximum Eligible Age: 45 Years
• Eligible Sex: ALL
• Accepts Healthy Volunteers: Yes

Sponsors

Chung-Ang University Hosptial, Chung-Ang University College of Medicine

OTHER

Sponsor Role: lead

Responsible Party

WonSoo Kim

Department of Ophthalmology, Chung-Ang University Hospital

Responsibility Role: PRINCIPAL_INVESTIGATOR

Locations

Chung-Ang University Hospital

Seoul, Seoul, South Korea

Site Status: RECRUITING

Countries

South Korea

Central Contacts

WonSoo Kim, MD

Role: CONTACT

onewat5@hotmail.com

+82-2-6299-1666

Facility Contacts

WonSoo Kim, MD

Role: primary

onewat5@hotmail.com

+82-2-6299-1666

References

Kim WS, Park IK, Park YK, Chun YS. Comparison of Objective and Subjective Changes Induced by Multiple-Pinhole Glasses and Single-Pinhole Glasses. J Korean Med Sci. 2017 May;32(5):850-857. doi: 10.3346/jkms.2017.32.5.850.

Reference Type: DERIVED

PMID: 28378561 (View on PubMed)

Other Identifiers

ChungAngUHeye

Identifier Type: -

Identifier Source: org_study_id