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Transcript of Bionic Eye
Bionic devices are being developed to do more than replace defective parts.
Researchers are also using them to fight illnesses.
Further improvements are expected to follow within five to seven years, with a 1000-electrode implant that will enable previously blind people to see .
We are now looking at devices like bionic arms, tongues, noses etc
Not useful for patients who are blind by birth.
Not useful for glaucoma patients.
RESULT OF BIONIC EYE TREATMENT:
Means inability to see OR imperfect sight of normal eye.
Damage to :
1 Clear structures in the eye ,that allows the light to pass through.
2 The nerves with in the eye
3 Optic nerve
The resolution challenge:
Bio electronic eye.
Electronic device which replaces functionality of a part of eye.
The bionic eye will be effective for individuals who are not blind by birth.
This technique will prove beneficial for many people deprived of their vision in the near future.
Will assist people suffering from macular degeneration & retinitis pigmentos.
The solution - Bionic eye?
Hyperopia, or farsightedness, is the opposite of myopia. Distant objects are clear, and close-up objects appear blurry. With hyperopia, images focus on a point beyond the retina.
Refractive Errors: Refractive errors occur when the curve of the cornea is irregularly shaped.
1 MYOPIA: Nearsightedness is when light entering the eye is focused incorrectly, making distant objects appear blurred.
Sight is a process made possible by many parts of the eye working together. We can compare the working of the eye with a camera.
1.The ability to interpret information & surroundings from the effects of visible light reaching the eyes.
2.The resulting perception is also known as eyesight, sight, or vision.
ELEMENTS OF BIONIC EYE
Light enters the eye
Bending of light through cornea and passes to pupil. Pupil adjusts the amount of light entering the eye. Light rays bends due to lens and focused on retina.
The retina is covered in an array of tiny rods and cones, light-sensing cells through which light is converted into pulses of electricity for the brain to read and transform into an image.
WORKING OF NORMAL EYE
A miniature camera
The bionic eye consists of three elements:
A pair of dark glasses which transmits images to a radio received implanted next to the patient’s eye
A tiny chip of silicon and platinum (4mm sq) that sits on the retina.
1: Camera on glasses views image
2: Signals are sent to hand-held device through this fibre.
The chip’s electrodes stimulate the ganglion cells that transmit visual information to the optic nerve and onwards to the brain, which can then construct a visual image.
3: Processed information is sent back to glasses and wirelessly transmitted to receiver under surface of eye
4: Receiver sends information to electrodes in retinal implant
5: Electrodes stimulate retina to send information to brain