Blind Left Eye, Blind Right Eye, One Eye Blindness
Conditions
Keywords
Simulated Walking, Collision, Field Expansion, One eye blindness
Brief summary
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.
Interventions
DEVICEMultiplexing Prism
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.
Sponsors
Massachusetts Eye and Ear Infirmary
National Eye Institute (NEI)
Study design
Allocation
NA
Intervention model
SINGLE_GROUP
Primary purpose
BASIC_SCIENCE
Masking
NONE
Intervention model description
Individuals with Acquired Monocular Vision/ Blindness in One Eye
Eligibility
Sex/Gender
ALL
Age
16 Years to No maximum
Healthy volunteers
No
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)
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| Mean response time to detect colliding pedestrian | Approximately 3 sessions, up to 3 hours for each session, any time within 4 month period | 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. |
Secondary
| Measure | Time frame | Description |
|---|---|---|
| Pedestrian Detection Rate | Approximately 3 sessions, up to 3 hours for each session, any time within 4 month period | 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. |
Countries
United States
Contacts
PRINCIPAL_INVESTIGATOREli Peli, OD
Schepens Eye Research Institute
Outcome results
None listed