Bridled or controlled in terms of vision; possibly refers to a horse with blinkers or restrictions on its field of vision.
Compound of 'eye' and 'bridled' (from Old French 'bride,' a bridle). This appears to be a rare or technical equestrian term.
Horses wearing blinders have their eyes bridled—limited to forward vision—so they can't spook at side movement. It's practical engineering of perception.
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