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

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

Status: Completed

Conditions: Accommodation

Treatments: Device: the WAM-5500 binocular autorefractor/keratometer (Grand Seiko Co. Ltd., Hiroshima, Japan)

Study type: Observational

Funder types: Other

Identifiers

NCT03557346

CAUHOphthalmology

Details and patient eligibility

About

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.

Full 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).

Enrollment: 64 patients

Sex: All

Ages: 20 to 40 years old

Volunteers: Accepts Healthy Volunteers

Inclusion criteria

1. age between 20 and 40 years
2. spherical equivalent (SE) within ± 4.0 diopters (D)
3. correctable distant and near visual acuity by glasses to 20/20
4. normal ocular alignment.

Exclusion criteria

1. disturbance of accommodation (e.g., Adie's pupil, Parkinson's disease, accommodative esotropia, accommodative spasm, presbyopia)
2. disorders that can affect accommodation (e.g., history of ocular trauma, previous ocular surgery)
3. disorders that might limit testing accuracy (e.g., corneal pathological features, cataract, glaucoma, vitreous opacity, and retinal abnormalities).