Artificial retina
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The document discusses the development of an artificial retina using thin film transistors that can be implanted on the inside surface of the human eye. The artificial retina contains electronic photo devices and circuits integrated on a transparent and flexible substrate. It is intended to help treat retinal diseases like retinitis pigmentosa and macular degeneration by replacing non-functioning retinal cells. The artificial retina uses a matrix of pixels that contain photo transistors and output different voltages based on light levels. Wireless power transmission through inductive coupling is used to power the implant without needing an implanted battery. The thin film transistors that make up the artificial retina circuits can be fabricated using low temperature poly-silicon processes and ion doping techniques.
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1) The document discusses artificial retina and bionic eye technologies that aim to restore vision. It describes how the human eye works and common eye diseases. 2) An artificial silicon retina is a microchip implanted beneath the retina that detects light and sends signals to the optic nerve, allowing individuals to see spots of light or basic shapes. A bionic eye involves a camera, processor, and implant to translate images into electrical pulses for the optic nerve. 3) Both technologies have helped some blind individuals identify objects, but have limitations like image resolution and required surgery. Ongoing research seeks to improve artificial vision systems.
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This document discusses electroretinography (ERG), which measures the low voltage electrical activity of the retina. It provides a brief history of ERG and describes the different cellular components that contribute to the ERG waves. The document outlines ERG protocols, materials, and analysis methods. It discusses factors that can influence the ERG and clinical applications for evaluating retinal function and diseases.
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Bionic eyes are artificial electronic devices that can replace some or all of the functions of the eye. They consist of a small chip that is surgically implanted behind the retina. There are two main types: MARC uses multiple retinal chips while ASR uses an artificial silicon retina. Bionic eyes are compact, compatible with diagnostics, and reduce stress on the retina. However, they are costly, damage to a single chip could render the technique useless, and providing power and connections to the brain poses challenges. Overall, bionic eyes aim to restore vision for conditions like macular degeneration and retinitis pigmentosa.
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The document discusses the development of an artificial retina using thin film transistors that can be implanted on the inside surface of the human eye. The artificial retina contains electronic photo devices and circuits integrated on a transparent and flexible substrate. It is intended to help treat retinal diseases like retinitis pigmentosa and macular degeneration by replacing non-functioning retinal cells. The artificial retina uses a matrix of pixels that contain photo transistors and output different voltages based on light levels. Wireless power transmission through inductive coupling is used to power the implant without needing an implanted battery. The thin film transistors that make up the artificial retina circuits can be fabricated using low temperature poly-silicon processes and ion doping techniques.
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1) The document discusses artificial retina and bionic eye technologies that aim to restore vision. It describes how the human eye works and common eye diseases. 2) An artificial silicon retina is a microchip implanted beneath the retina that detects light and sends signals to the optic nerve, allowing individuals to see spots of light or basic shapes. A bionic eye involves a camera, processor, and implant to translate images into electrical pulses for the optic nerve. 3) Both technologies have helped some blind individuals identify objects, but have limitations like image resolution and required surgery. Ongoing research seeks to improve artificial vision systems.
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This document discusses electroretinography (ERG), which measures the low voltage electrical activity of the retina. It provides a brief history of ERG and describes the different cellular components that contribute to the ERG waves. The document outlines ERG protocols, materials, and analysis methods. It discusses factors that can influence the ERG and clinical applications for evaluating retinal function and diseases.
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Bionic eyes are artificial electronic devices that can replace some or all of the functions of the eye. They consist of a small chip that is surgically implanted behind the retina. There are two main types: MARC uses multiple retinal chips while ASR uses an artificial silicon retina. Bionic eyes are compact, compatible with diagnostics, and reduce stress on the retina. However, they are costly, damage to a single chip could render the technique useless, and providing power and connections to the brain poses challenges. Overall, bionic eyes aim to restore vision for conditions like macular degeneration and retinitis pigmentosa.
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This document provides information on various types of phakic intraocular lenses (IOLs) that are implanted to correct refractive errors while leaving the natural lens in place. It discusses the history of phakic IOLs and describes anterior chamber angle-supported IOLs, iris-fixated IOLs, and posterior chamber phakic IOLs. The key points covered include the indications, surgical procedures, power calculation methods, potential complications, and advantages/disadvantages of each phakic IOL type.
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This document describes the development of bionic eyes or artificial vision technology. It discusses how artificial retinas made of silicon or ceramic photocells could be implanted through microsurgery to detect light and stimulate the retina and optic nerve, restoring some vision. The artificial retina called the ASR contains over 3,500 photodiodes that convert light into electrical signals to stimulate remaining retinal cells. Surgeons implant the microchip by making small incisions in the eye and inserting the chip under the retina without external wires or batteries. This technology holds promise for restoring sight to those blinded by retinal diseases.
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OCT is a non-invasive ,non contact technology.its an emerging technology and it is used for wide variety of applications.
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Email:asad.optom92@yaho. com
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Optical coherence tomography
Optical coherence tomography (OCT) is a non-invasive imaging technique that uses infrared light to generate high-resolution cross-sectional images of the retina and anterior segment of the eye. OCT operates similarly to ultrasound imaging except that it uses light instead of sound waves. The OCT scan provides qualitative and quantitative analysis of the retina by identifying layers and measuring thickness. It can detect various pathological structures and abnormalities and is useful for diagnosing and monitoring diseases like glaucoma. Anterior segment OCT also allows high-resolution imaging of the cornea and anterior chamber.
Bionic eye
The document describes the bionic eye and how it aims to restore vision for the blind. It discusses how a bionic eye works using a camera and microchip to convert images into electrical pulses that stimulate the retina. Specific projects are mentioned, like the artificial silicon retina which is a microchip implanted in the eye containing photodiodes. The Argus II is highlighted as the first approved bionic eye system, which transmits wireless signals from eyeglass cameras to a retinal implant in order to produce spots of light that the brain interprets as vision.
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Optical coherence tomography (OCT) is an advanced imaging technology which uses light waves to take cross section images of your retina.
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Potential acuity meter
The potential acuity meter (PAM) measures retinal visual acuity behind cataracts or other media opacities by projecting a small beam of light through clear areas of the cataract. It is used to estimate visual outcomes after cataract surgery and other procedures. PAM testing is performed quickly in a dimly lit room after pupil dilation and involves having the patient read letters as the light beam is repositioned. While PAM tends to underestimate potential acuity, it provides a reasonably reliable method for predicting visual results of cataract surgery.
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The document discusses the development of an artificial retina using thin film transistor technology. It describes how retinal conditions like retinitis pigmentosa and age-related macular degeneration cause vision loss and how an artificial retina could help. The artificial retina would be implanted either on top of the retina (epiretinal) or underneath (subretinal) and use thin film transistors to detect light and stimulate remaining retinal cells via electrical pulses. Both approaches have advantages and disadvantages relating to attachment, heat dissipation, power requirements and image processing. Complications from long-term implantation are also addressed. The technology shows promise for restoring basic vision but has limitations and further development is still needed.
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The document describes the development of an artificial retina using thin-film transistors (TFTs) that can be implanted in the back of the human eye. The artificial retina contains photo sensors and circuits integrated on a flexible substrate using poly-silicon TFTs. It receives wireless power through inductive coupling between an external coil and an internal receiving coil embedded in the eye. The artificial retina is aimed at restoring vision by stimulating the retina with an array of pixels that output different voltages based on light levels detected by phototransistors.
artificial retina using thin film transistor
This document discusses artificial retina technology which uses microelectronics and microchip electrodes surgically implanted into the back of the eye to restore vision for patients with damaged photoreceptor cells. It describes the components of an artificial retina implant, including photodiodes that sense light and stimulate retinal nerve cells. The document also outlines the fabrication process for artificial retinas using thin-film transistors on flexible substrates, and discusses some patients' experiences of regained vision with these implants.
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presentation_bionic_eye_1509629649_211160.pptx
This seminar document discusses the bionic eye, which aims to restore vision. It begins by explaining how the natural retina works and eye diseases like retinitis pigmentosa and macular degeneration that damage the retina. An artificial silicon retina is presented as a visual prosthesis that detects light and converts it to electrical signals for the brain. The bionic eye builds upon this by adding a camera, visual processing unit, and microelectrode array implanted near the optic nerve to stimulate it wirelessly. While promising to help the blind see light and basic shapes, challenges remain in the bionic eye's repair ability, cost, and ability to match natural vision.
Blind people
This document describes the development of an artificial vision system to cure blindness. It discusses how researchers are developing retinal implants that can process images from a camera into electrical signals that the optic nerve can interpret as vision. The system includes a miniature video camera, a processor to translate images into signals, and an infrared screen on goggles to stimulate a silicon chip implanted on the retina. This technology has potential to restore limited sight to those blinded by retinal degeneration, though it cannot currently provide high-resolution images.
Bionic eye
The document discusses the bio electronic eye, which replaces some or all functionality of the eye using electronics. It provides a history of the development of the bionic eye, describes how the human eye works compared to the bionic version, and details the key components and working principle of the MARC retinal prosthesis system. Some advantages are that it can be implanted with minimal surgery and has low power needs, though limitations include the difficulty of repairs and high costs. The conclusion is that while full vision may not be restored, bionic eyes can help the blind see shapes and objects.
Artifcial Eye
The Artificial Technology from its introduction to its future perspective. if you need report send me mail, would gladly share.
Soumya Selvaraj (Bionic Eye)
Bionic eye is a device that can provide sight-detection of light.
Researches working for the Boston Retinal Implant Project have been developing Bionic eye implant that could restore the eye sight of people who suffer from age related blindness.
It is based on a small chip that is surgically implanted behind the retina, at the back of the eye ball.
Ultra thin wires strengthens the damaged optic nerve.
The user should wear special eye glasses battery powered camera and a transmitter.
Bionic eye
PPT about VISUAL PROSTHESIS, a vision for blind people, which I made for my college purpose. Gathered Information from its official sites.
Bionic eye
The document discusses bionic eyes and retinal prosthetics for restoring vision. It describes how a bionic eye works by using a miniature camera to capture images and transmit the data to a microchip implanted behind the retina. The chip then stimulates the retina with electrical pulses to allow signals to be sent to the brain. Several technologies are discussed, including an artificial silicon retina containing photodiodes, the MARC system using an external camera and implanted receiver/stimulator, and ceramic photocells being developed to detect light and repair eyes. While promising, full restoration of vision remains challenging due to the complexity of the human visual system.
Bionic eye
The document discusses bionic eyes and retinal prosthetics for restoring vision. It describes how a bionic eye works by using a miniature camera to capture images and transmit the signals to a microchip implanted behind the retina. The chip then stimulates the retina to send signals to the brain that can be interpreted as vision. Several technologies are discussed, including an artificial silicon retina containing photodiodes, the MARC system using an external camera and implanted stimulator, and ceramic photocells being developed to detect light and repair eyes. While promising, bionic eyes still only provide basic vision and developing the technology to replicate the full capabilities of the human eye remains challenging.
Bionic lens report
The document discusses bionic eyes and retinal implants. It begins with an introduction to bionic eyes and their potential to restore vision for the blind. It then provides details on the anatomy and function of the eye and retina. It discusses two major causes of retinal degeneration - retinitis pigmentosa and age-related macular degeneration. The document outlines the need for bionic eyes to restore lost vision. It describes the basic components and working of a bionic eye system like the Argus II, which uses a camera and transmitter to stimulate a retinal implant. The goal is to increase the resolution of implants to allow reading and facial recognition.
Bionic eye
The document discusses the bionic eye, which aims to restore sight for those with vision impairment. It works by bypassing non-functioning photoreceptors and using a retinal implant connected to a camera to convert images into electrical signals that stimulate the retina. The latest version, Argus II, has been approved for use in Europe since 2011 and the US since 2013. It consists of an implant with electrodes that is surgically placed on the retina, connected to external glasses with a camera and processing unit. The camera captures scenes and the processing unit converts them into signals sent to the implant wirelessly via the glasses, stimulating the retina and allowing basic vision.
Bionic eye
1. Scientists are developing a bionic eye called an artificial retina that could restore vision. It works by using a small implanted chip with light-sensitive cells that transmit signals to the optic nerve and brain.
2. The chip detects incoming light and transmits electrical signals to stimulate remaining retinal cells. Early versions used silicon but now scientists are testing ceramic cells that are safer for the human body.
3. The surgery to implant the chip involves making small incisions to insert the chip and use fluid to lift the retina and seal it over the chip. The goal is to replace damaged photoreceptor cells and restore basic vision.
Artificial silicon ratina
This document summarizes an artificial silicon retina (ASR) seminar presentation. It describes how ASR technology works to restore vision by implanting a microchip retinal prosthesis that converts light into electrical signals. The ASR is small enough to fit in the eye and receives power from light, without needing batteries. It sends signals through the optic nerve to the brain, allowing some patients to perceive images. However, ASR technology remains highly experimental and can only provide basic vision currently. Much more research is still needed to develop it further.
Short presentation on 'BIONIC EYES'
The document discusses bionic eyes, which are electrical prosthetics surgically implanted in humans to allow vision for those who have severe retinal damage. It explains that a bionic eye works through a camera that captures images and sends the information to a microprocessor. The microprocessor converts the data to electrical signals that are transmitted to a receiver and then to an electrode panel implanted on the retina. The retinal implant emits pulses along the optic nerve to the brain, which perceives patterns of light and dark corresponding to the stimulated electrodes. The advantages are diagnostic capability and compact size, while disadvantages include high cost and risk of the device failing if any single part is damaged.
49540326 electronic-eye
The document describes the development of an "Electronic Eye" technology to help restore vision. Researchers are creating an artificial retina made of silicon microchips that can be implanted in the eye. The chips contain photodiodes that convert light into electrical signals to bypass retinal cells damaged by conditions like macular degeneration. Early results show people able to see spots of light or basic shapes. The technology relies on a small camera, processor, and implants in the visual cortex to allow some sight. This could help the millions of people worldwide suffering from blindness.
Visual prosthesis
visual prosthesis replicates the natural vision of the eye and are one of the newer innovations in the field of ophthalmology. Helps in degenerative disease like Age related macular degeneration , retinitis pigmentosa etc.
Iaetsd silverline for the blind
This document summarizes research on developing artificial vision systems to restore sight for the blind. It describes two key technologies: the artificial silicon retina and artificial retina component chip. The artificial silicon retina is a microchip implanted in the eye that contains photodiodes that convert light into electrical signals to stimulate the retina. The artificial retina component chip is similar and provides a 10x10 or 250x250 pixel visual field. The document explains how these devices work and the surgical process for implantation. It also outlines an artificial vision system using a camera, signal processor and brain implants to transmit images and provide a limited form of artificial sight.
Bionic eye
The document discusses bionic eyes, which are electronic devices that can replace dysfunctional parts of the eye and restore vision. It describes two approaches for a bionic eye - an artificial silicon retina (ASR) which is a microchip implanted under the retina, and a multi-unit artificial retina chipset (MARC) which uses an external camera, transmitter and implanted chip and electrodes. Both aim to stimulate remaining healthy retinal cells and transmit signals to the brain to provide a limited form of artificial vision. However, challenges remain in developing a bionic eye with sufficient resolution and long-term durability.
plasitc
This document summarizes research on developing artificial vision systems to restore sight to blind individuals. It describes two main approaches: retinal implants like the artificial silicon retina that replace photoreceptors in the retina, and cortical implants that stimulate the visual cortex. The document outlines how these systems work, including capturing images with a camera and processing signals to stimulate the retina or brain. It also discusses the current limitations of artificial vision and ongoing research needed to improve image clarity and functionality for blind individuals.
Arti
This document summarizes research on developing artificial vision systems to restore sight to blind individuals. It describes two main approaches: retinal implants like the artificial silicon retina that replace photoreceptors in the retina, and cortical implants that stimulate the visual cortex. The document outlines how these systems work, including capturing images with a camera and processing signals to stimulate the retina or brain. It also discusses the current limitations of artificial vision and ongoing research needed to improve image clarity and functionality for blind individuals.
Artificial Eye For The Blind
The document discusses the development of artificial vision technology known as the Argus II retinal prosthesis system. It describes the components of the system, which includes a small implanted electronic device, an external video camera and processing unit. The camera captures images and sends signals to the implant, which stimulates neurons in the retina to allow individuals to perceive patterns of light and basic shapes. While providing an ability to perform some visual tasks, the technology remains limited and very expensive. Future developments aim to reduce costs and further miniaturize the devices using advanced technologies.
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Artificial retina
- 2. Contents How human eye works? Diseases related to eye Implantation What is Bionic Eye? Components Working Results & Advantages Limitations & Drawbacks
- 4. Working of human eye : The eye is one of the most important organs of the body. Before we learn about ASR, it is important to know the working of natural retina. The light coming from an object enters the eye through cornea and pupil and forms inverted image on the retina. The light sensitive cells of the retina gets activated with the incidence of light and generate electric signals. These electric signals are sent to the brain by the optic nerves and the brain interprets the electrical signals in such away that we see an image .
- 5. Diseases Age related macular degeneration(AMD or ARMD): Macular degeneration, often age-related macular degeneration , is a medical condition that usually affects older adults and results in a loss of vision in the center of the visual field (the macula) because of damage to the retina.
- 6. Retinitis Pigmentosa It is a chronic hereditary eye disease characterized by black pigmentation, gradual degeneration of the retina and causes narrowing of vision.
- 7. History of BIONIC EYE : -Dr.Mark Humayun, Dr. Eugene Dejuan along with few more scientists demonstrated that a visually impaired person could be made to see light by stimulating the optic nerves behind the retina with electrical impulses. This test proved that the nerves behind retina still functioned even when the retina had degenerated. Based on this scientists set out to create a devise that could translate images to electrical pulses that could restore vision. Groups of researchers have found that blind people can see spots of light when electrical currents stimulate cells, following the experimental insertion of an electrode device near to the retina. The main target of the research was: small enough to be implanted in the eye. supplied with a continuous source of power. bio-compatible with eye tissues and its surroundings.
- 8. WHAT IS ARTIFICIAL RETINA TECHNOLOGY??? Artificial Retinas are referred to as visual prosthesis, it is also known as a bionic eye It is an experimental visual device intended to restore functional vision in those suffering from partial or total blindness In this presentation we will be discussing about the Artificial Retina made using. Thin-Film Transistors, which can be fabricated on transparent and exible substrates. Electronic photo devices and circuits are integrated on the artificial retina, which is implanted on the inside surface of the living retina at the back part of the human eyeballs.
- 9. RETINAL IMPLANTATION:- A retinal implant is a biomedical implant technology currently being developed by a number of private companies and research institutions worldwide. The first application of an implantable stimulator for vision restoration was developed by Drs. Brindley and Lewin in 1968. The implant is meant to partially restore useful vision to people who have lost their vision. There are two types of retinal implants namely epiretinal implant and subretinal implant.
- 10. Components Required for a bionic eye
- 11. Camera mounted on eye Glasses: This camera is placed on the goggles. The camera captures the image and converts it into pixels of black and white. The battery required for this is provided from the video processing unit. Video processing unit (VPU) : Video Processing Unit is device which simplifies the image as spots of light and then reduces the image to the number of photodiodes. This is connected to goggles through connecting wires.
- 12. Eye Implant : These are the MICROELECTRODES array. 68 flat platinum electrodes of 1mm diameter are pierced through the holes into the nucleus of neurons of the occipital lobe.
- 14. Working of BIONIC EYE : The camera mounted on a pair of eyeglasses, captures the scene in front of the wearer and sends it to VPU on the patient's belt. The processor translates the image into a series of signals that the brain can understand. The group of wires pass the processed image which are generated by the processor to the transmitter. RF transmitter sends the signal to the RF receiver which is near the eye implant wirelessly. Receiver attains the transmitted signal and demodulation is done which is sent to the microelectrode strip. These electrodes converts it into electrical pulses and provide it to the optic nerve.
- 15. Advantages : Identify the location or movement of objects and people. Recognize large letters, words or sentences. Helps in other activities of daily life, such as detecting street curbs and walking on a sidewalk without stepping off. Ability to perform visual tasks demonstrated in many patients. Upgradable external hardware and software to benefit from future innovations. The brain has an amazing ability to adapt to new input and to improve his or her understanding of what is being “seen” via an artificial vision system.