Transfer characteristics of subretinal visual implants: corneally recorded implant responses.

ABSTRACT:

Purpose

The subretinal Alpha IMS visual implant is a CE-approved medical device for restoration of visual functions in blind patients with end-stage outer retina degeneration. We present a method to test the function of the implant objectively in vivo using standard electroretinographic equipment and to assess the devices' parameter range for an optimal perception.

Methods

Subretinal implant Alpha IMS (Retina Implant AG, Reutlingen, Germany) consists of 1500 photodiode-amplifier-electrode units and is implanted surgically into the subretinal space in blind retinitis pigmentosa patients. The voltages that regulate the amplifiers' sensitivity (V _gl) and gain (V _bias), related to the perception of contrast and brightness, respectively, are adjusted manuall

SUBMITTER: Stingl K 

PROVIDER: S-EPMC5052310 | biostudies-literature | 2016 Oct

REPOSITORIES: biostudies-literature