Download e-book for kindle: Artificial Vision: A Clinical Guide by Veit Peter Gabel

By Veit Peter Gabel

This booklet offers and analyses the newest examine devoted to restoring imaginative and prescient in people who are critically impaired or blind from retinal affliction or harm. it really is written through the major teams world wide who're on the vanguard of constructing man made imaginative and prescient. The booklet starts off through discussing the problems in evaluating and examining practical leads to the realm of very low imaginative and prescient and the primary customers and barriers of spatial solution with man made instruments. additional on, chapters are integrated through researchers who stimulate the skin or the pigment epithelial facet 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 man made imaginative and prescient study teams to provide an explanation for in a related and stringent order their various techniques, the medical or preclinical results and their achievements over the last years. Senior ophthalmic fellows and educational practitioners will locate this advisor to be an essential source for realizing the present prestige of man-made imaginative and prescient.

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Extra resources for Artificial Vision: A Clinical Guide

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21] reported that their eyehand coordination task (placing black checkers on the white fields of a checker board) could be done using a viewing condition with 325 phosphene dots. Whole Body Mobility Whole body mobility is important in daily living. We explored this category of tasks in various environments, representative of different every-day situations. First, a well-known indoor environment, a laboratory course with six known but randomly placed obstacles was used (Fig. 3a, [22]). Performance was measured as 34 a J.

Commercially available retinal implants are not yet able to satisfy such high expectations: Performance of implanted patients remains relatively low and there is extremely high variability between patients. Are state of the art, commercially available devices are really useful for their wearers? In a functional low-vision observer rated assessment, 65 % of the participating Argus II patients (N = 23) reported a positive or mild positive effect 3 years after implantation [34]. This does not really tell much about the utility of the device in daily living which can probably best be estimated by analyzing the effective time the devices are used by the patients (on their own).

4 The ‘random forest’ task. (a) Example of a test configuration: empty dots represent ‘white trees’ to be avoided, filled dots represent ‘black trees’ to be localized and touched, starting point S, end point E. Arrows represent the starting point of dynamic obstacles (0–2 persons could cross the ‘forest’ at any time and had to be avoided). (b) Performance as a function of spatial resolution in pix/deg2 A viewing window with 500 pixels and representing an effective field of view of 33° × 23° appeared to be the best compromise for this task.

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