I don't have any personal experience with tear duct issues, but many of our posters have had tear duct plugs put in to increase eye moisture.
The surgery seemed to be uneventful in all cases, I don't recall anyone having trouble with it.
Dunno' if that helps any, sorry...
Lynnwood, Lupus & Sjogren's Moderator, Dx: 2002DIAGNOSING LUPUS & HW's LUPUS 101
"Life is far too important to be taken seriously." - Oscar Wilde