Object Finder for a Retinal Prosthesis

Retinitis Pigmentosa Clinical Trial

Official title: Object Finder for a Retinal Prosthesis

Status Completed

Clinical Trial Summary

The proposed project seeks to provide object recognition as a feature in a retinal implant system. Participants will be able to direct an object recognition application to find a desired object in the field of view of the head-mounted camera, and to direct the participant's view towards it through the presentation of a recognizable icon. A prototype system will be developed and evaluated in human subjects in phase I. A full system implementation and a second phase of the trial will be completed in phase II.

Clinical Trial Description

The investigators propose to add an object-finding feature to a retinal prosthesis system. To use this feature, the participant will enable a special mode and input the desired object from a set of pre-programmed object types. Imagery from the visible light camera in the system eyeglasses will be processed using object recognition software as the participant scans their head across the room scene. When the object is identified in the scene by the processor, a flashing icon will be output to the epiretinal array in the appropriate position to guide the participant to the physical location of the object. Once located, the system will track the location of the object.

There will be two phases to the human subjects evaluation, each run initially through simulations in sighted human subjects, followed by tests in Argus II participants. In phase 1, system evaluation in human subjects at Johns Hopkins UNiversity (JHU) will explore performance in representative tasks and compare prosthetic visual performance without and with the new object finding feature. An important aspect of the evaluation will be the comparison of different icons and presentation modes to assist participants in locating and reaching objects. In phase 2, the system will be integrated into the Argus II video processing unit (VPU), and JHU will conduct human trials that include functional testing of the integrated prototype in representative environments and optimizing the ergonomics of the system, e.g. simultaneous finding and tracking of multiple objects/icons. ;

Related Conditions & MeSH terms

• Retinitis
• Retinitis Pigmentosa

• NCT number: NCT04319809
• Study type: Interventional
• Source: Minnesota HealthSolutions
• Status: Completed
• Phase: N/A
• Start date: July 1, 2017
• Completion date: August 31, 2022