id	author	title	date	pages	extension	mime	words	sentences	flesch	summary	cache	txt
en-wikipedia-org-6783		Camera obscura - Wikipedia			.html	text/html	9761	1025	71	While, e.g., Alhazen (Ibn al-Haytham) had already observed an optical effect and developed a state of the art theory of the refraction of light, he was less interested to produce images with it (compare Hans Belting 2005); the society he lived in was even hostile (compare Aniconism in Islam) toward personal images.[66] Western artists and philosophers used the Arab findings in new frameworks of epistemic relevance.[67] E.g. Leonardo da Vinci used the camera obscura as a model of the eye, René Descartes for eye and mind and John Locke started to use the camera obscura as a metaphor of human understanding per se.[68] The modern use of the camera obscura as an epistemic machine had important side effects for science.[69][70] While the use of the camera obscura has dwindled, for those who are interested in making one it only requires a few items including: a box, tracing paper, tape, foil, a box cutter, a pencil and a blanket to keep out the light.[71]	./cache/en-wikipedia-org-6783.html	./txt/en-wikipedia-org-6783.txt