Artificial Vision: A Clinical Guide by Veit Peter Gabel

By Veit Peter Gabel

This booklet provides and analyses the newest learn devoted to restoring imaginative and prescient in people who are critically impaired or blind from retinal disorder or harm. it really is written through the prime teams world wide who're on the leading edge of constructing man made imaginative and prescient. The booklet starts via discussing the problems in evaluating and studying useful ends up in the world of very low imaginative and prescient and the critical clients and barriers of spatial solution with synthetic instruments. additional on, chapters are incorporated via researchers who stimulate the outside or the pigment epithelial aspect of the retina and by way of specialists who paintings on stimulating the optic nerve, the lateral geniculate physique and the superficial layers of the visible cortex.

Artificial imaginative and prescient: A scientific consultant collates the latest paintings of key synthetic imaginative and prescient learn teams to give an explanation for in a related and stringent order their various methods, the scientific or preclinical results and their achievements over the past years. Senior ophthalmic fellows and educational practitioners will locate this consultant to be an integral source for knowing the present prestige of man-made imaginative and prescient.

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Another potential target 26 G. Dagnelie group is formed by those with ULV (or completely blind) who may soon become participants in early clinical trials of stem cell and gene therapy approaches, as well as prosthetic devices stimulating higher visual pathways, especially the visual cortex. One validated and calibrated PRO instrument, the IVI-VLV [7], contains items that can capture vision at the level of movement detection and light localization, although most of its items require shape recognition.

However, more work is needed on reliability and especially MID, the smallest difference that makes a difference, even for basic tasks. Many of the higher order functional tasks suffer from a lack of ecological validity – the laboratory functional assessment is not likely to predict performance in the real world. This problem arises primarily because the tests use illumination levels that are too high or are composed of uniform black and white components. Presumably they are not designed to incorporate features of the world outside the lab but so that they can be passed by patient who have implants Performance-based functional outcomes, such as those reviewed here, should be considered in conjunction with patient-reported outcomes (PROs, or questionnaire), Not only are the methods for developing reliable and valid PROs more mature, they provide important information from the patients’ perspective.

It is also possible to test for more complex forms of sensory integration using techniques that were designed primarily for studying visual development in children. Garcia and colleagues [23] tested five patients implanted with the Argus II on a vision – touch task, (judging the size of a ball) a vision – hearing task (judging latency of a beep and flash), and a vision – self motion task (navigation). None of the participants showed any improvement with addition visual information on the size or navigation tasks; two showed a gain in speed judgements.

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