BIONIC EYE

Presented by V.Avinash

Overview

1.Introduction

2.Eye defects

3.Bionic Eye Approaches

4.MARC

5.ASR

6.Advantages & Disadvantages

7.Future Scopes

Introduction

A Bionic Eye is a device, which acts as an artificial eye. It is a broad term for the entire electronics system consisting of the image sensors, processors, radio transmitters &receivers, and the retinal chip

Eye Defects .

1.RETINIS PIGMENTOSA Caused by the breakdown in the function of

rods &cones

2. MACULAR DEGENERATION

Retinal Pigment Epithelium gradually wears out

Bionic Eye:Two Approaches

MARC-Multiple Unit Artificial Retina Chipset

ASR-Artificial Silicon Retina

Multiple Unit Artificial Retina Chipset (MARC) – The Concept

Artificial Silicon Retina: The Second Approach

The ASR is a silicon chip2 mm in diameter and 1/1000 inch in thickness.

It contains approximately3,500

microscopic solar cells called microphotodiodes,

each having its own stimulating electrode.

These microphotodiodes are designed to

convert the light energy from images into

thousands of tiny electrical impulses

Adv: Receives power from light entering the eye

Eliminates use of power supplies

The Resolution Challenge

The Images

The top image shows the raw output of the retina chip.

The middle one a picture processed from it.

The third shows how a moving face would appear.

Advantages

Assist people suffering from RP&AMD Quite durable –last for atleast 10yrs inside eye. Easy surgical methods involved Small component size Reduction of stress upon the retina

Disadvantages

Donot restore perfect vision but gives sense of surroundings

Only effective for people who once had sight Optic nerves should be functional atleast

partiallly Highly Expensive

Future scopes

Face recognition –use of 1000 electrodes Bionic eye to work beyond capability of human

eye. Detect X-ray,infrared,night vsion. Reduced cost

Conclusion

Artificial Eye is such a revolution in medical science field which help the blind people to be able to find their way, recognize faces, read books, above all lead an independent life