Steven Prawer Bionic Vision Australia, University of Melbourne - PowerPoint PPT Presentation

Steven Prawer Bionic Vision Australia, University of Melbourne Victoria

The Bionic Eye www.materials.unimelb.edu.au

The BVA team z Courtesy of Kumar Ganesan, 2010 10mm Courtesy of Gregg Suaning, 2010

BVA’s c ompetitive advantage The Team Arman Ahnood Nick Apollo Wei Tong Mathilde Escudie

Motivation: Eye Disease Retinitis Pigmentosa (RP) : Age Related Macular Degeneration (AMD)  Leading cause of inherited blindness  Major cause of vision loss in Western Countries  1.5 million people affected world wide  20-25 million people affected worldwide  25% of RP patients are legally blind  Current cost (Australia) > $2B/year

Retinal prosthesis  Epi-retinal  Supra choroidal  Sub-retinal  Aim: stimulate the inner retina bypassing the damaged photoreceptors.

What it looks like Image courtesy of Bionics Institute

Di Ashworth Di NICTA Testing-HD 720p.mov BVA VNR FTA_MP4 360p (16x9).mp4

What do you see here? 16 Phosphenes

What do you see here? 64 Phosphenes

What do you see here? 1000 Phosphenes

What do you see here? Original Picture

Can you read this? 16 Phosphenes

Can you read this? 64 Phosphenes

Can you read this? 1000 Phosphenes

Choice of material for electrodes  Mechanically durable  Electrically conductive core and insulating body  Biocompatible  Chemically inert  High thermal conductivity  High charge injection capacity

Diamond: the material E XCEPTIONAL PROPERTIES INCLUDE : 4: D IAMOND AS A B IOMATERIAL 4: D IAMOND AS A B IOMATERIAL http://www.diamond-materials.com/ prod_heatspreaders_en.htm http://venda.uku.fi/research/biomaterials/Coatin gsBMTG.shtml D IAMOND UNIT CELL SAMANTHA LICHTER, ARNAM 2010 SAMANTHA LICHTER, ARNAM 2010

Diamond  MPCVD - Polycrystalline diamond  Recipe: H 2 , CH 4 for insulating PCD and H 2 , CH 4 , Ar, N2 for conducting UNCD  Conductivity: B- or N-doping