Functional and Physiological Changes Induced by Pinhole Glasses in Presbyopia

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

Status: Unknown

Conditions: Pinhole

Treatments: Device: Trayner Pinhole Glasses (Trayner Glasses, Ivybridge Devon, U.K.)

Study type: Interventional

Funder types: Other

Identifiers

NCT02722291

ChungAngUHophthalmology

Details and patient eligibility

About

This study is aimed at presbyopic patients that do not require magnifying glass at close rage. The purpose of this study is to investigate the functional and physiological changes in eye induced by pinhole glass.

Enrollment: 40 estimated patients

Sex: All

Ages: 45+ years old

Volunteers: Accepts Healthy Volunteers

Inclusion criteria

1. age over 45 years
2. spherical equivalents(SE) within ± 3.0 diopters(D)
3. 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

Trial design

Primary purpose: Basic Science

Allocation: N/A

Interventional model: Single Group Assignment

Masking: None (Open label)

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40 participants in 1 patient group

presbyopia

Experimental group

Description:

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

Treatment:

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