== Dioptrics == 

 I found this short article as I was searching to see if there was an article on Dioptrics (I had never heard that term before) so that I could create a link to it from the Roger Bacon article. The second sentence is: 

 :"Understanding of the principles of dioptrics was further expanded by Alhazen, considered as the father of modern optics." 

 Do you think "understanding" without "the" before it is all right? Wouldn't it sound better with "the"? 

 I've often seen "considered as" in WP articles and I don't like the sound of it. Do you like it? To me, it would sound better: 

 (a) with "to be" instead of "as":  "considered to be the father of modern optics", or 

 (b) simply without "as": "considered the father of modern optics". 

 What do you think?