Determine Functions of Pinhole Glasses on the Eyes

Chung-Ang University Hospital30 enrolled

Overview

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.

Study Type

INTERVENTIONAL

Allocation

Purpose

BASIC_SCIENCE

Masking

NONE

Enrollment

Conditions

Vision, Ocular

Interventions

Phinhole glassesDEVICE

Wearing the pinhole glasses (Trayner Pinhole Glasses, Trayner Glasses, U.K.)

Eligibility

Sex: ALLMin age: 20 YearsMax age: 50 YearsHealthy volunteers:

Medical Language ↔ Plain English

Inclusion Criteria: * 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. Exclusion Criteria: * 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.

Locations (1)

Department of Ophthalmology, Chung-Ang University School of Medicine, Chung-Ang University Hospital

Seoul, Seoul, South Korea

Outcomes

Primary Outcomes

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.)