Presentation is loading. Please wait.

Presentation is loading. Please wait.

The Bionic Eye JON GOLDBERG, BME 181 SECTION 3. The Problem The Photoreceptor ◦Photoreceptors signal the presence of light in the visual field. ◦Rods:

Similar presentations


Presentation on theme: "The Bionic Eye JON GOLDBERG, BME 181 SECTION 3. The Problem The Photoreceptor ◦Photoreceptors signal the presence of light in the visual field. ◦Rods:"— Presentation transcript:

1 The Bionic Eye JON GOLDBERG, BME 181 SECTION 3

2 The Problem The Photoreceptor ◦Photoreceptors signal the presence of light in the visual field. ◦Rods: Low light, no color detection. ◦Cones: Light required, three types of cones produce the perception of color when combined. Degeneration ◦Retinitis Pigmentosa: Loss of photoreceptors, both rods and cones, in the back of the eye. ◦Macular Degeneration: Age and genetic related. ◦Caused by atrophy of epithelial layer in retina or abnormal blood vessel growth. ◦Causes 30% of all eye-related problems ages 75 to 85.

3 Types of Bionic Eyes Argus II ◦Uses external components to “amplify” what it seen, has a camera. Alpha IMS ◦Uses implants in brain to bypass retina and hook into optical nerve. Harvard ◦Externally worn glasses that amplify what it seen, same as the Argus II.

4 Argus IIAlpha IMS

5 The Alpha IMS Extremely new technology. No external components besides the battery. No camera is used, unlike the Argus II. ◦3x3m microchip in retina captures a visual resolution of 1500 pixels. ◦Microchip bypasses damaged photoreceptors, uses natural eye to “see” ◦Placement of microchip allows the middle layer of the retina to do it’s processing of input. ◦Allows movement of eye to look around, rather than the entire head. Allows users to see black and white details. ◦The brighter the object, the more it shows up. ◦Cars and water, when reflected upon by the sun, was the most visible to those participating.

6 The Design

7 The Study and Problems Nine people were used in the first pilot human trial. ◦Eight were successful trials. The ninth had complications during implementation, in which the optic nerve was accidently touched during surgery, making the user invalid for the trial. ◦All those who were successful with implant reported success in viewing objects and shapes. ◦Large and very observable details were noticed by those with the device. ◦When light reflected off objects, the users could detect those objects much more. Very early in trial. Just got the go for more trials in Hong Kong and the UK. ◦The emulated photoreceptors work better with extreme light. Low light levels makes it near impossible to see. ◦Complicated surgery. Eye is opened for the microchip placement, and the receiver is placed deep in the brain. ◦Hooks into natural processes, requires effort in reverse engineering biological methods.

8 More Problems Extremely new technology. The science journal published with the trial findings was only in February ◦There hasn’t been a lot of criticism about the device other than light reception problems. It is still unknown of the long-term function and stability of the device. ◦Hong Kong and UK trials will specifically look at this. This method of visual prosthesis relies on a semi-functioning eye. ◦If the user is plagued with more than just photoreceptor degeneration, this method will not work. ◦Meaning, optic nerve and pre-photoreceptor components need to still work. There are still external components. The Alpha IMS goal is to remove all external requirements. ◦This would involve getting a battery somewhere in the body to power the microprocessor.

9 References 1."Artificial Vision with Wirelessly Powered Subretinal Electronic Implant Alpha-IMS." Artificial Vision with Wirelessly Powered Subretinal Electronic Implant Alpha-IMS (2013): n. pag. Artificial Vision with Wirelessly Powered Subretinal Electronic Implant Alpha-IMS. 20 Feb Web. 30 Mar Ostrovsky, Gene. "Retinal Implant Alpha IMS Brings Sight to Blind in New Study (w/video)." Retinal Implant Alpha IMS Brings Sight to Blind in New Study (w/video). MedGadget, 21 Feb Web. 30 Mar Soupporis, Aaron. "The Verge." The Verge. N.p., n.d. Web. 30 Mar


Download ppt "The Bionic Eye JON GOLDBERG, BME 181 SECTION 3. The Problem The Photoreceptor ◦Photoreceptors signal the presence of light in the visual field. ◦Rods:"

Similar presentations


Ads by Google