Multiplexing Prism Fitting for Field Expansion of Monocular Vision

Mass Eye and Ear

Status: Completed

Conditions: Blind Left Eye; Blind Right Eye; One Eye Blindness

Treatments: Device: Multiplexing Prism

Study type: Interventional

Funder types: Other; NIH

Identifiers

NCT06027216

2023P001878

R01EY031777 (U.S. NIH Grant/Contract)

Details and patient eligibility

About

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.

Enrollment: 30 patients

Sex: All

Ages: 16 to 75 years old

Volunteers: No Healthy Volunteers

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)

Trial design

Primary purpose: Device Feasibility

Allocation: N/A

Interventional model: Single Group Assignment

Masking: None (Open label)

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30 participants in 1 patient group

Field Expansion

Experimental group

Description:

Field of view on the nasal side (same side as the blind eye) with and without multiplexing prism

Treatment:

Device: Multiplexing Prism