They have just the opposit effect to that, Sandy. They are to
stop them from being distracted. Generally speaking, you will only find them used on carriage horses, and on a few race horses where it has been found that they run better, in a race, when they are blinkered.
http://www.horseridinglesson.co.uk/B...sAndReins.html
http://www.horseracinghistory.co.uk/...wQuiz?gameid=2
http://intl.elsevierhealth.com/e-boo...ook.cfm?ID=932
Thinks! ..... We are in grave danger of high-jacking this thread!

..... Sorry, Jim.