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www.materials.unimelb.edu.au
The Bionic Eye
Steven Prawer Bionic Vision Australia, University of Melbourne - - PowerPoint PPT Presentation
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 BVAs c ompetitive advantage The
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The BVA team
z
Courtesy of Kumar Ganesan, 2010 10mm Courtesy of Gregg Suaning, 2010
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BVA’s competitive advantage The Team
Arman Ahnood Nick Apollo Wei Tong Mathilde Escudie
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Motivation: Eye Disease
Age Related Macular Degeneration (AMD)
Major cause of vision loss in Western Countries 20-25 million people affected worldwide Current cost (Australia) > $2B/year
Retinitis Pigmentosa (RP) :
Leading cause of inherited blindness 1.5 million people affected world wide 25% of RP patients are legally blind
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Retinal prosthesis
- Epi-retinal
- Supra choroidal
- Sub-retinal
- Aim: stimulate the inner retina bypassing the damaged photoreceptors.
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Image courtesy of Bionics Institute
What it looks like
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Di Ashworth
Di NICTA Testing-HD 720p.mov BVA VNR FTA_MP4 360p (16x9).mp4
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16 Phosphenes
What do you see here?
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64 Phosphenes
What do you see here?
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1000 Phosphenes
What do you see here?
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Original Picture
What do you see here?
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16 Phosphenes
Can you read this?
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64 Phosphenes
Can you read this?
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1000 Phosphenes
Can you read this?
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Choice of material for electrodes
- Mechanically durable
- Electrically conductive core and insulating body
- Biocompatible
- Chemically inert
- High thermal conductivity
- High charge injection capacity
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EXCEPTIONAL PROPERTIES INCLUDE: DIAMOND UNIT CELL
Diamond: the material
4: DIAMOND AS A BIOMATERIAL
SAMANTHA LICHTER, ARNAM 2010
4: DIAMOND AS A BIOMATERIAL
SAMANTHA LICHTER, ARNAM 2010
http://venda.uku.fi/research/biomaterials/Coatin gsBMTG.shtml http://www.diamond-materials.com/ prod_heatspreaders_en.htm
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Diamond
- MPCVD - Polycrystalline diamond
- Recipe: H2, CH4 for insulating PCD and H2, CH4 , Ar, N2
for conducting UNCD
- Conductivity: B- or N-doping
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