I have been told by several people that allowing my young children (aged 2 and 5 at the time of writing) to use an iPad, or similar device, would affect their eyesight. I have found the following articles that appear to support this claim.
http://news.ninemsn.com.au/health/8476967/ditch-the-ipad-and-send-kids-out-to-play
http://usa.chinadaily.com.cn/china/2012-03/09/content_14793242.htm
The impression seems to be that children should be avoiding using this kind of device until they are at least 7 years old.
Is there any more recent scientific evidence to back up this claim than the surveys in 2007 which were before the introduction of the iPad?