NCT03557346

Objective Verification of Physiologic Changes During Accommodation Under Binocular, Monocular, and Pinhole Conditions

• Status: Completed
• Phase: —
• Study type: Observational
• Enrollment: 64 (actual)
• Sponsor: Chung-Ang University Hosptial, Chung-Ang University College of Medicine · Academic / Other
• Sex: All
• Age: 20 Years – 40 Years
• Healthy volunteers: Accepted

Summary

The investigators believe that this simple, clear, and objective study may be a great help in understanding the accommodative response during various accommodative stimulation conditions.

Detailed description

The purpose in this study was to investigate physiological changes in accommodative power, pupil diameter, astigmatic value, and axis when visual stimuli were applied under binocular, monocular (dominant eye, non-dominant eye, ipsilateral, and contralateral), and pinhole conditions using the WAM-5500 binocular autorefractor/keratometer (Grand Seiko Co. Ltd., Hiroshima, Japan).

Conditions

• Accommodation

Interventions

Type	Name	Description
DEVICE	the WAM-5500 binocular autorefractor/keratometer (Grand Seiko Co. Ltd., Hiroshima, Japan)	: Subjects underwent a basic ophthalmic examination and the accommodative response to refractive stimuli was measured. Refractive stimuli were given at 0.25 diopters (D) (4 m distance), 2D (50 cm), 3D (33 cm), and 4D (25 cm) and stimulation was applied with the eyes in binocular, monocular (dominant eye, non-dominant eye, ipsilateral, and contralateral), and pinhole conditions. In addition, changes in the astigmatic value and direction of the astigmatism axis under binocular stimulus were evaluated.

Timeline

• Start date: 2017-01-02
• Primary completion: 2017-03-31
• Completion: 2017-03-31
• First posted: 2018-06-15
• Last updated: 2018-06-15