Multiplexing Prism Fitting for Field Expansion of Monocular Vision

Massachusetts Eye and Ear Infirmary30 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 are testing a simplified design and fitting protocol to provide field expansion for individuals with acquired monocular vision.

Study Type

INTERVENTIONAL

Allocation

Purpose

DEVICE_FEASIBILITY

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) * No medical health issues such as seizures, motor movements problem 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 motor movements problem (e.g., unable to use extremities)

Locations (1)

Schepens Eye Research Institute

Boston, Massachusetts, United States

Outcomes

Primary Outcomes

Gain in Visual Field With the Multiplexing Prism

Field expansion is calculated based on the difference of the maximum field of view on the nasal side of the seeing/functioning eye (same side as the blind eye) with and without multiplexing prism.

Time frame: Visit 2 of Study (approximately 2-3 weeks after 1st Visit)

Secondary Outcomes

Maximum Extent of Nasal Visual Field With the Multiplexing Prism

The farthest extent of the nasal visual field with the multiplexing prism placed in front of the seeing eye.

Time frame: Visit 2 of Study (approximately 2-3 weeks after 1st Visit)

Data from ClinicalTrials.gov

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