| 摘要 |
Device for observing optical images which comprises, on the one hand, visual and/or auditory elements, such as books, journals (magazines), illustrations, recorded sounds and, moreover, images (11), the theme of which is in keeping with the subject to be treated and in negative inversion with respect to the image which is to be perceived in positive mode by the individual due to the effect of the persistence of vision (retinal persistence). <IMAGE>
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