Feasibility Tests for Various Prism Configurations for Visual Field Loss

Launched by MASSACHUSETTS EYE AND EAR INFIRMARY · Jun 8, 2020

Keywords

ClinConnect Summary

This clinical trial is looking into how different types of special glasses with high-power prisms can help people who have lost part of their vision. This condition is called visual field loss, which can make it difficult to see obstacles while walking. The goal is to find the best designs for these glasses so they can be used in future studies to improve safety and mobility for patients.

To participate in this study, individuals should have some form of visual field loss but still be able to see reasonably well with their better eye. They should also be in good health to manage visits that last a few hours and be able to walk short distances independently. Participants will typically visit the Schepens Eye Research Institute four times to try on the glasses and help researchers gather information on how to make these devices better. It's important to note that those with certain health issues, like balance problems or recent seizures, may not be eligible for the trial.

Gender

ALL

Eligibility criteria

• Inclusion Criteria:
• • Visual field loss, either peripheral field loss or hemianopic field loss
• • Visual acuity of at least 20/50 in the better eye
• • In sufficiently good health to be able to complete sessions lasting 2-4 hours
• • Able to independently walk short distances
• • Able to give voluntary, informed consent
• • Able to speak English
• Exclusion Criteria:
• • Any physical or mental impairments, including cognitive dysfunction, balance problems or other deficits that could impair the ability to walk or use the prism spectacles
• • A history of seizures in the last 6 months
• • Hemispatial neglect (subjects with hemianopic field loss only)