Accommodation Disorders (AD)

Western University of Health Sciences (WESTERN U)

Status: Completed

Conditions: Accommodative Insufficiency; Ill-sustained Accommodation

Study type: Observational

Funder types: Other

Identifiers

NCT01329848

1R15EY021021

Details and patient eligibility

About

This project will develop clinically useful, objective measurements of accommodative insufficiency and fatigue using continuous autorefraction recordings. The development of these procedures will help vision care professionals diagnose and treat accommodative anomalies.

Full description

This project studies accommodative function, the ability to focus while doing near work. Visual discomfort symptoms, such as headaches, sore eyes, and blurred vision are commonly associated with prolonged reading or other near work. Researchers have long suspected accommodative dysfunction was involved but most clinical studies have failed to establish a relationship between weak accommodation and symptoms or reading impairments. Recent research, however, has found that clinical measure overestimate accommodative function and encourage the use of objective, autorefraction methods to measure and study accommodative weakness. This project will accomplish three goals. First, using autorefraction objective reliable procedures will be developed for measuring accommodative lag, the difference between the target location and where the eye is focused. Second, experiments will measure in real-time the impact of accommodative lag on reading fluency and visual discomfort systems. Third, studies will explore the role of the slow adaptive component in accommodative weakness. This work will lead to better methods for diagnosing and treating accommodative disorders.

Enrollment: 83 patients

Sex: All

Ages: 18 to 30 years old

Volunteers: Accepts Healthy Volunteers

Inclusion criteria

• older adolescent and young adult
• skilled readers who attend school
• are skilled readers
• have heavy reading demands

Exclusion criteria

• Age > 30.
• Abnormal vergence system.
• Dry-eye.
• Uncorrected visual defects or significant ocular pathology.
• Learning disability or low IQ
• Medical conditions that might cause uncomfortable visual symptoms (e.g., migraine headaches, epilepsy, head trauma); sensory defects (e.g., deafness), or neurological conditions (e.g., stuttering) that could impair reading development or oral reading fluency.
• Somatosensory amplification.
• Systemic illness or medication associated with accommodative dysfunction.

Trial design

83 participants in 1 patient group

discomfort symptoms

Description:

level of discomfort symptoms while performing near work