What do you suggest for a bi-focal wearer? My husband just ordered his first pair of bi-focals and we are taking a trip in less than a month. We are going to a location where there are lots of whales at that time of year, plus plenty of cruise ships and interesting boats floating by. I thought a pair of binoculars would be a nice surprise for him, but one of the reviewers said if you wear bi-focals that this was not the pair for you. Any suggestions for a bi-focal wearer?