I was wondering if any other readers suffer from colour blindness. I struggle quite badly with red, green and brown, resulting in some quite strange edits. I have enclosed two photos, one which I’m told looks natural and one that through my eyes looks more natural. Brian McAuley, via email You’re the first one who’s written in, Brian, but we’re sure you’re not alone. You say ‘strange edits’, but we say, ‘unique vision’!