Functional and Physiological Changes Induced by Pinhole Glasses in Presbyopia

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

UNKNOWN

Clinical Phase

NA

Total Enrollment

40 participants

Study Classification

INTERVENTIONAL

Study Start Date

2016-03-31

Study Completion Date

2017-03-31

Brief Summary

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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.

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Detailed Description

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Conditions

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Pinhole

Study Design

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Allocation Method

NA

Intervention Model

SINGLE_GROUP

Primary Study Purpose

BASIC_SCIENCE

Blinding Strategy

NONE

Study Groups

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presbyopia

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

Group Type EXPERIMENTAL

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

Intervention Type DEVICE

Interventions

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

Intervention Type DEVICE

Eligibility Criteria

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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

Minimum Eligible Age

45 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

Yes