Misdirected lashes could occur due to laxity of skin at age of 83, so your father needs to be examined for misdirected lashes. If they are found, epilation should be done. This should solve the problem of watering. This has to be done repeatedly nearly every month and he should use some sulphacetamide eye drops 2-3 times a day. Blurry vision could be the result of cataract
which should be ruled out. If cataract is present, cataract extraction with IOL implant can be done which is a simple procedure now a days.