This document discusses the development of an artificial retina implant using microelectromechanical systems (MEMS) technology. It begins with an overview of retinal diseases like retinitis pigmentosa and age-related macular degeneration that could be treated with such an implant. It then describes two approaches for retinal implants - the epiretinal approach, which stimulates the ganglion cells, and the subretinal approach, which replaces photoreceptors with photodiodes. The document focuses on the epiretinal implant, outlining its components like a microcable and electrodes, and the microfabrication process used to create the thin polyimide film for the implant. It concludes that MEMS technology can play an

1. Artificial Retina Implantation
Using MEMS
By,
Chaithra D
1MS15LEC07

2. Contents
 Working of Eye
 Need of artificial retina
 Approches To Cure Retinal Disease
 Epiretinal Implant Using MEMS
 Microfabrication of Microelectrodes
 Conclusion
 Refferences

3. Fig 1. Human Eye
Human Eye

4. Why Artificial Retina…?
 Types of Retinal Diseases:
 Retinitis Pigmentosa (RP)
 Age related Macular Degeneration (AMD)

5. Approaches To Cure Retinal
Diseases
 The Epiretinal approach stimulates the ganglion.
 The Subretinal approach replaces photoreceptors by
photodiodes.
Fig 2. Epiretinal Approach

6. Epiretinal Microimplant
Fig 3.Epiretinal System

7. Components of ERI
Fig 4. Componets Involved In The Epiretinal Impantation

8. Contd…
Fig 7. The ERI Showing the 25 Stimulation Electrodes at the end of
the Microcable

9. Microfabrication
 The most important point in epiretinal implant is the
microfabrication of polyimide film:
Fig 6.1. Microfabrication of flexible 15 μm thin polyimide film.

10. Contd…
Fig 6.1. Microfabrication of flexible 15 μm thin polyimide film.

11. Conclusion
 MEMS technology plays an important role in curing the
retinal diseases.
 Long-term biocompatibility.

12. References
 Sergey Yurish, “Sensors and Bio-Sensors, MEMS technology and
its application”, text book.
 www..scme--nm..orrg.
 Kolnsberg.s, Kneip.T, Huppertz.J, Haushild.R, Schwarz.M,
Hammershmidt.D, Hosticka.B.J, Ewe.L and Trieu,H.K,
“Microelectronic Components for a Retina Implant System”.218-
221,2010. 25th European Solid-State Circuits Conference
(ESSCIRC).

13. THANK YOU