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Bionic Eye

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Published in: Biotechnology | Electronics
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A Detail Presentation on Bionic Eye. 

Yashwanth G / Hyderabad

3 years of teaching experience

Qualification: B.Tech/B.E. (Jntuhces - 2017), M.Tech (VNR VIGNANA JYOTHI (Structural ENGG) - 0)

Teaches: Geography, Mathematics, Science, Chemistry, Logic, Algebra, Physics, B.Tech Tuition, Civil

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  1. B10NIC EYE
  2. INTRODUCTION e A bionic eye works by stimulating nerves, which are activated by electrical impulses,
  3. CAUSE OF BLINDNESS: Retinitis pigmentosa Age related mascular degeneration
  4. '13. Caml *lemm Ciliay '12. Aqueous 6. Pupil 14, 5. tris Sclero 7. Reim 9.CVc nerve O, Optic disc Fig: Internal parts of an eye
  5. INTERNAL STRUCTURE OF RETINA: Rods Cones Ganglion cells
  6. RODS AND CONES: There are about 125 million rods and cones. Rods have low resolution. Cones have high resolution.
  7. BIONIC EYE: Two types of approaches: 1. MARC (Multiple unit Artificial Retinal Chipset) 2. Silicon retina
  8. Block diagram of MARC RF Telemetry Coils Video camera Image Processor PWM Encoder 0 Illside Class-E Power Amplifier ASK Modulator MARC Diagnostics i i i i i i i Power Recovery El
  9. Class E power amplifier: It is highly efficient switching power amplifier typically used at high frequencies. Clock: Clock is defined at the raising edge of the pulse. Power: Rectification provides the required DC power.
  10. STRUCTURE OF MICRO DETECTORS: The arrays are stacked in a hexagonal structure, which mimics the arrangement of rods and cones. 100 garn Fig: Structure of micro detectors 10
  11. WORKING OF BIONIC EYE 1. Digital camera 2. Video processing microchip 3. Radio transmitter 4. Radio receiver 5. Retinal implant Fig: Over view of bionic eye
  12. IMPLANT OF CHIP IN THE EYE Implanted micro- detectors Fig: Implantation of ceramic micro detector The first implant had only 16 electrodes, the new device has 60 electrodes and the receiver is shrunk to one - quarter of the original size. Implantation time is reduced from 7.5 hrs to 1.5 hrs.
  13. ADVANTAGES: Helps correct vision No complicated surgical procedure Can be easily implanted No batteries implanted within the body
  14. DISADVANTAGES : Cost is more Research cost is more Other axons get excited between ganglion cells which results in blur electrode and 14
  15. EXPECTATIONS IN FUTURE : As device resolution improves, patient quality of life increases so Oces ee First advanced prototype (1 00 electrodes): Unaided navigation, object discrimination. Second prototype(1 000 electrodes): Face, motion and letter recognition. Future possibilities (by replacement of some of the interconnecting neural cells that lead to optic nerve) : Colour vision. 15
  16. 0 Thank You 01 16

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