



{"id":3400,"date":"2011-04-19T09:40:20","date_gmt":"2011-04-19T07:40:20","guid":{"rendered":"http:\/\/www.largeur.com\/?p=3400"},"modified":"2022-11-15T10:16:25","modified_gmt":"2022-11-15T09:16:25","slug":"sante-10","status":"publish","type":"post","link":"https:\/\/largeur.com\/?p=3400","title":{"rendered":"Cin\u00e9ma et TV 3D, un supplice optique"},"content":{"rendered":"<p><img loading=\"lazy\" decoding=\"async\" title=\"3D_supplice.png\" src=\"\/wp-content\/uploads\/3D_supplice.png\" alt=\"3D_supplice.png\" width=\"468\" height=\"300\" border=\"0\" \/>La radio aurait d\u00fb nous rendre sourds, la t\u00e9l\u00e9vision aveugles, les jeux vid\u00e9os \u00e9pileptiques. Plus r\u00e9cemment, les mobiles et les ampoules LED nous irradieraient. Les premi\u00e8res attaques port\u00e9es \u00e0 la 3D \u00e9taient des reproches plus que des craintes. Elles visaient le port obligatoire et d\u00e9sagr\u00e9able de lunettes, la faible luminosit\u00e9, le r\u00e9tr\u00e9cissement de l\u2019image, ainsi que le prix des billets de cin\u00e9ma et des t\u00e9l\u00e9viseurs compatibles.<\/p>\n<p>La derni\u00e8re charge est administr\u00e9e par Walter Murch, monteur, sc\u00e9nariste et r\u00e9alisateur am\u00e9ricain, \u00aboscaris\u00e9\u00bb pour \u00abApocalypse Now\u00bb. Son grief se pr\u00e9vaut de scientificit\u00e9. En brisant la synergie naturelle d\u2019accomodation-convergence op\u00e9r\u00e9e par nos yeux, la 3D nous infligerait un v\u00e9ritable supplice optique.<\/p>\n<p>Petite explication. Alors que, pour garantir la nettet\u00e9 des images, nos cristallins focalisent sur la surface de l\u2019\u00e9cran, nos pupilles sont, elles, oblig\u00e9es de suivre des objets situ\u00e9s \u00e0 des distances tr\u00e8s diverses. Un exercice perturbateur et fatigant quand on sait qu\u2019en vision r\u00e9elle, l\u2019homme accommode et converge sur le m\u00eame sujet. Il en va de m\u00eame pour le cin\u00e9ma 2D, o\u00f9 le spectateur accommode et converge sur l\u2019\u00e9cran.<\/p>\n<p>Pour Murch, la dissociation entre accommodation et convergence est une prouesse r\u00e9alisable, sans quoi les films en 3D ne fonctionneraient pas. Mais notre cerveau est con\u00e7u pour nous faire prendre conscience d\u2019un monde en 3D, et non pour le reconstruire. \u00abC\u2018est faire fi de six cents millions d\u2019ann\u00e9es d\u2019\u00e9volution qui ne nous ont pas pr\u00e9par\u00e9s \u00e0 pareille gymnastique. Il s\u2019agit d\u2019un probl\u00e8me de fond, qu\u2019aucune tentative de peaufinage technique ne pourra r\u00e9soudre\u00bb, soutient Murch dans une lettre adress\u00e9e \u00e0 <a href=\"http:\/\/blogs.suntimes.com\/ebert\/2011\/01\/post_4.html\" target=\"_blank\" rel=\"noopener noreferrer\">Robert Ebert<\/a>, un critique de cin\u00e9ma tr\u00e8s estim\u00e9. En 2010, un de ses articles dans Newsweek, <a href=\"http:\/\/www.newsweek.com\/2010\/04\/30\/why-i-hate-3-d-and-you-should-too.html\" target=\"_blank\" rel=\"noopener noreferrer\">Why I Hate 3D (And You Should Too)<\/a> ouvrit les hostilit\u00e9s contre la 3D assimil\u00e9e sous sa plume \u00e0 de la \u00abD-minus\u00bb.<\/p>\n<p>La probl\u00e9matique est la m\u00eame sur les petits \u00e9crans. Avec des personnages qui jaillissent de l\u2019\u00e9cran, des impressions de profondeur saisissantes, sans lunettes, la nouvelle console Nintendo 3DS permet l\u2019exp\u00e9rience d\u00e9coiffante qui consiste \u00e0 entrer dans la r\u00e9alit\u00e9 augment\u00e9e. \u00abElle promet un divertissement unique qui saute aux yeux, mais ce qu&rsquo;elle provoque en r\u00e9alit\u00e9 c&rsquo;est la naus\u00e9e, des yeux endoloris et des maux de t\u00eates qui donnent le vertige\u00bb, mettait en garde un <a href=\"http:\/\/www.independent.co.uk\/life-style\/health-and-families\/health-news\/health-warning-for-children-over-new-3d-games-console-2219975.html\" target=\"_blank\" rel=\"noopener noreferrer\">article<\/a>, avant m\u00eame sa sortie.<\/p>\n<p>Le fabricant nippon de 3DS n\u2019est pas rest\u00e9 insensible \u00e0 cette critique et admet que son nouveau produit pourra affecter les personnes atteintes du mal des transports et m\u00eame celles n&rsquo;en ayant jamais souffert. De plus, l&rsquo;exposition prolong\u00e9e \u00e0 la 3D occasionnera une fatigue oculaire chez les joueurs. Nintendo leur conseille de faire des pauses toutes les trente minutes. Quant aux enfants de moins de 7 ans, ils ne devraient pas utiliser la 3D car leur syst\u00e8me oculaire n\u2019est pas totalement mature.<\/p>\n<p>La formule \u00ab\u00e0 consommer avec mod\u00e9ration\u00bb pourrait r\u00e9sumer les recommandations d\u2019utilisation restrictives qui, principe de pr\u00e9caution oblige, prolif\u00e8rent du c\u00f4t\u00e9 des fabricants de consoles et t\u00e9l\u00e9viseurs 3D. Mais tant de choses d\u00e9licieuses nuisent gravement \u00e0 la sant\u00e9&#8230; Qu\u2019il est agr\u00e9able de sortir de la projection de <a href=\"http:\/\/www.cinema.ch\/fr\/films\/pina.9192\" target=\"_blank\" rel=\"noopener noreferrer\">\u00abPina\u00bb<\/a>, avec la t\u00eate qui tourne! Sans 3D, Wim Wenders l\u2019a affirm\u00e9 \u00e0 plusieurs reprises, jamais il n\u2019aurait tourn\u00e9 ce film.<\/p>\n<p>Alors, nocive cette technologie? Il semble av\u00e9r\u00e9 que les personnes dont la vision n\u2019est pas identique pour chaque oeil, ainsi que celles qui ont des difficult\u00e9s d\u2019accommodation oculaire, pourront \u00eatre victimes de maux de t\u00eates, de vertiges ou de vomissements.<\/p>\n<p>Et les bien lotis, que risquent-ils? Il n\u2019existe pour l\u2019heure aucune preuve scientifique de l\u2019innocuit\u00e9 de cette technologie. Le premier <a href=\"http:\/\/www.bigpicturebigsound.com\/Doctors-Discuss-the-Mechanics-and-Hidden-Benefits-of-3D.shtml\" target=\"_blank\" rel=\"noopener noreferrer\">symposium m\u00e9dical<\/a> portant sur ce sujet controvers\u00e9 vient de se tenir en mars \u00e0 New York (\u00ab3D Vision and Health Symposium\u00bb, State University of New York College of Optometry). Il a permis d\u2019identifier un b\u00e9n\u00e9fice non n\u00e9gligeable de la 3D: la d\u00e9tection pr\u00e9coce de troubles de la vue chez les enfants.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Visionner un film en 3D serait-il une aberration? C&rsquo;est la th\u00e8se de Walter Murch, r\u00e9alisateur d&rsquo;\u00abApocalypse Now\u00bb, pour qui cette gymnastique visuelle n&rsquo;a rien de naturelle pour le cerveau. <\/p>\n","protected":false},"author":375,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[5],"tags":[1298],"class_list":["post-3400","post","type-post","status-publish","format-standard","hentry","category-latitude","tag-chroniques","latitude"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 4.9.8 - aioseo.com -->\n\t<meta name=\"robots\" content=\"max-image-preview:large\" \/>\n\t<meta name=\"author\" content=\"Genevi\u00e8ve Grimm-Gobat\"\/>\n\t<meta name=\"keywords\" content=\"chroniques,latitudes\" \/>\n\t<link rel=\"canonical\" href=\"https:\/\/largeur.com\/?p=3400\" \/>\n\t<meta name=\"generator\" content=\"All in One SEO (AIOSEO) 4.9.8\" \/>\n\t\t<meta property=\"og:locale\" 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