Thursday, February 17, 2022

Visual acuity of Eye Replacements

Improvements of Visual acuity of Eye Replacements

Visual acuity of Argus II (60 electrodes) and alpha-IMS (1500 electrodes)

Rupert Summerskill 2022 Advocate of WHO & MSF Medical Sans Frontier

Argus® II Retinal Prosthesis System Surgeon Manual

Performance specification examined : Full Study

Bio-Modifiers & Eyes & ears + Flexible and Stretchable Bioelectronics

Modelling, Simulation and Analysis of NPDA for Sub-retinal implant using Nano Materials

prostheses list : Body part replacement list thank you Australia 2022-02

Bullet points : Key issues of neuroleptic surgery for seizures for example : Observable small twitching in the eyes shows that single nerves resolve impulse..

According to my studies :

Brain bit precision suggests 5 to 8Bit signals per diode may interact with Nerve cells ideally..

7Bit is cynically a rarer case; However provide us with a 14 Bit signal to resolve or the 40Bit potentially in EYE Cells & the brain may learn as we progress towards a higher resolution resolve ..

On the diode signal : Digital & Analogue : However in analogue 32Bit it at least arguably premium for us;

Haptic sensation (usable in many instances with training to resolve sensation into 3D & may be utilized to resolve internal brain tissue 3D Imaging & feeling by comprehension of the facts surrounding 'Simple Feeling'

Wave ANC may resolve overlapping wave issues such as waving lines and mores patterns of imaging & feeling:

Temporal aliasing may improve both the level of voltages in the electrodes & increase cross diode interactions..

But also improve sensor processing.

CPU Design may be improved & code:

Bionics & Medical

Key issues (8–10 bullet points summarizing the review)

Performance in relatively simple visual tasks, e.g. object localization, improved in nearly 100% of the tested Argus II subjects

More complex tasks, e.g. detection of motion, improved in approximately 50% of Argus II subjects.

An orientation and mobility (O&M) task based on walking towards a high-contrast target, or walking along a high-contrast line on the floor improved significantly when using the implant in a grouped analysis of Argus II subjects.

The differences between reported visual acuity of Argus II (60 electrodes) and alpha-IMS (1500 electrodes) wearers are small, despite the theoretical 8 times lower resolution of the Argus II device.

Retinal implant functionality is likely limited by many factors including physical (e.g., channel interactions), physiological (e.g., retinal degeneration) and human factors (e.g., the patient’s capability to comprehend prosthetic vision)

Retinal implant functionality is limited by many factors including electrode-electrode interactions and a sub-optimal tissue-electrode interface. At present, hardware engineering factors, such as electrode size and electrode density, may be of lesser importance.

Vision processing strategies, patient screening methods and optimizing the electrode-tissue interface are aspects of implant functionality that can be improved in the future.

The Argus II device will be continuously improved, including the implementation of advanced vision processing strategies, zooming, eye scanning, and colour coding.

Within 5 years from now, SSMP hopes to implant more than 2000 Argus II devices worldwide.

According to current plans, the next generation SSMP device will be a high-acuity retinal implant with 240 electrodes and a cortical 60-electrode implant.

1 comment:

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