Vision Therapy for Convergence Insufficiency

Recruiting in Palo Alto (17 mi)

Overseen byMark F. Walker, MD

Age: 18+

Sex: Any

Travel: May Be Covered

Time Reimbursement: Varies

Trial Phase: Phase 1

Waitlist Available

Sponsor: VA Office of Research and Development

No Placebo Group

Trial Summary

What is the purpose of this trial?Post-concussive vision symptoms affect many Veterans who have experienced traumatic brain injury (TBI). One common issue is trouble with near vision, a problem that may persist long after the acute injury. Double vision or difficulty focusing on close objects can affect reading and depth perception. Poor reading can interfere with academic or work performance, and loss of near focusing can affect jobs that require fine motor tasks like machining and electrical work. Even having trouble using a smartphone can have a substantial impact on both work and social function. Near vision impairment after TBI is not well understood, and treatments are limited. The goal of this project is to investigate novel virtual-reality assessments and training games to improve the near vision diagnosis and home-based rehabilitation. Restoring normal near vision function could have a large impact on the fulfillment of Veterans' educational, career, and overall life goals.

Eligibility Criteria

This trial is for Veterans who have experienced traumatic brain injury (TBI) and are struggling with near vision problems like double vision or difficulty focusing on close objects, which can impact reading and depth perception.

Inclusion Criteria

Best-corrected visual acuity 20/25 or better in each eye

Convergence insufficiency (VR-NPC < 32 deg)

Place of residence within driving distance of Cleveland, OH

+2 more

Exclusion Criteria

I have a neurological condition affecting my eye movement.

I had vision problems like crossed eyes or lazy eye before a brain injury.

Participant Groups

The study is testing a virtual-reality convergence training game designed to improve near vision diagnosis and rehabilitation at home. It aims to help those with post-concussive vision symptoms restore normal function in their near vision.

2Treatment groups

Experimental Treatment

Group I: Group BExperimental Treatment1 Intervention

Non-intervention block followed by intervention block

Group II: Group AExperimental Treatment1 Intervention

Intervention block followed by non-intervention block