Feasibility Tests for Various Prism Configurations for Visual Field Loss

Description

The investigators will develop and test different configurations of high-power prisms to expand the field of vision of patients with visual field loss to assist them with obstacle detection when walking. The study will involve multiple visits (typically four) to Schepens Eye Research Institute for fitting and testing with the prism glasses. The overall objective is to determine best designs and fitting parameters for implementation in prism devices for future clinical trials.

Conditions

Hemianopia, Homonymous, Tunnel Vision, Visual Field Defect, Peripheral, Visual Field Constriction Bilateral, Visual Field Defect Homonymous Bilateral

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Study Overview

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Study Details

Study overview

The investigators will develop and test different configurations of high-power prisms to expand the field of vision of patients with visual field loss to assist them with obstacle detection when walking. The study will involve multiple visits (typically four) to Schepens Eye Research Institute for fitting and testing with the prism glasses. The overall objective is to determine best designs and fitting parameters for implementation in prism devices for future clinical trials.

Visual Field Expansion Through Innovative Multi-Periscopic Prism Design

Feasibility Tests for Various Prism Configurations for Visual Field Loss

Condition
Hemianopia, Homonymous
Intervention / Treatment

-

Contacts and Locations

Boston

Schepens Eye Research Institute, Boston, Massachusetts, United States, 02114

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

For general information about clinical research, read Learn About Studies.

Eligibility 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
  • * 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)

Ages Eligible for Study

7 Years to 80 Years

Sexes Eligible for Study

ALL

Accepts Healthy Volunteers

No

Collaborators and Investigators

Massachusetts Eye and Ear Infirmary,

Eliezer Peli, MSc, OD, PRINCIPAL_INVESTIGATOR, Schepens Eye Research Institute of Massachusetts Eye and Ear

Study Record Dates

2024-08