is an anticoagulant
or blood thinner. An eye complication is due to excessive bleeding either in the retina
or a haemorrhage that is seen from the outside . Red eyes in your case do not seem to be due to the warfarin. Excessive computer use often causes dry eyes
which can lead to blurry vision. Use lubricating eye drops and a lubricating eye ointment for a few days at night to relieve your symptoms. This should work in a few days but rest assured, the warfarin does not sound like a precipitating factor of blurred vision
in your case.