Patent: Canon shows off some information about the eye-controlled AF point selection

Actually the latest eye-control was in the EOS 30 around 2000 (20y ago!) and it already worked pretty well even then (my own experience). Why they haven't continued with it is beyond me.
The eos 30v came out in 2003 and I have one and I found the eye controlled focus works quite well if you use a large eyecup like my Hoodman one which keeps your eye in a fairly fixed position relative to the viewfinder
 
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