Cybercopyedit Optics Alhazen etc Hi About Cybercopyedit s changes to Optics This isn t sockpuppetry I complained that his previous username did not comply with policy and he handled it by creating a new one which is one of the recommended ways to deal with that problem I think he may have a valid point about Alhazen s book The article s previous statement that the book merely documented the then current understanding of vision does not appear to be supported by the reference that was already cited in the article I took a quick skim through the parts of it that are freely accessible earlier today and it appeared to show that Alhazen s work significantly expanded on the previous understanding of the subject Based on that one reference not contributed by Cybercopyedit as far as I know it appears that a stronger statement of Alhazen s contribution is warranted I ll take a closer look when I have a chance