Simulated Walking With Multiplexing Prism for Field Expansion in Monocular Vision

N/AActive Not RecruitingNCT06024668

Massachusetts Eye and Ear Infirmary1 enrolled

Overview

The investigators are developing an assistive device, known as multiplexing prism that expands the field of view for individuals with acquired monocular vision (loss of an eye). The investigators will test the efficacy of the prism in improving the detection of colliding pedestrians during a simulated walking task.

Study Type

INTERVENTIONAL

Allocation

Purpose

BASIC_SCIENCE

Masking

NONE

Enrollment

Conditions

One Eye Blindness Blind Left Eye Blind Right Eye

Interventions

Multiplexing PrismDEVICE

Multiplexing prism is designed for spatial vision multiplexing. It allows partial light transmission through the prism allow the observer to simultaneously see the physical world through the prism and see the "shifted view" from the non-seeing side. It is developed to expand the field of view of individuals with just one eye.

Eligibility

Sex: ALLMin age: 16 Years

Medical Language ↔ Plain English

Inclusion Criteria: * No medical health issues such as seizures, motor movements problem * Loss of vision in one eye (less than 20/200) for \>1 year * Visual acuity of the seeing eye: Better than 20/32 visual acuity with correction * No visual field defect in the seeing eye (nasal field of at least \>45degree) Exclusion Criteria: * Patients with any physical or mental disabilities, including cognitive dysfunction, balance problems, or other deficits that could impair their ability to respond to the stimuli presented in this study will be excluded * Any person with a history (such as pacemaker use or photosensitive epilepsy) * Any person with motor movements problem (e.g., unable to use extremities)

Locations (1)

Schepens Eye Research Institute

Boston, Massachusetts, United States

Outcomes

Primary Outcomes

Mean response time to detect colliding pedestrian

The investigators will compare the mean response time to detect colliding pedestrians coming from the nasal (same side as the blind eye) and temporal (same side as the seeing eye) visual field with and without multiplexing prism. The comparison will be made between these four: Nasal without prism, Temporal without prism, Nasal with prism, and Temporal with prism.

Time frame: Approximately 3 sessions, up to 3 hours for each session, any time within 4 month period

Secondary Outcomes

Pedestrian Detection Rate

The investigators will measure the rate of correct detection rate of colliding pedestrians in the nasal (same side as the blind eye) and temporal (same side as the seeing eye) with and without multiplexing prism. Comparisons will be made for these: nasal without prism, temporal without prism, nasal with prism,and temporal with prism.

Time frame: Approximately 3 sessions, up to 3 hours for each session, any time within 4 month period

Data from ClinicalTrials.gov

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