''It's image, and image is competition, and image promises the best jobs,'' said Dr. Hidally Velasco, half of whose patients -- 15 or 20 men a month -- are men. ''Older guys are being told they are too old and it is time to retire.'' Victor Muņoz, 62, a liquor distributor, wanted to make sure was not one of them. So he had Dr. Carranza tighten the skin on his face, take the bags out from under his eyes and do some simple division on his double chin. ''I am a businessman and people do not want to do business with older people -- I would not,'' he explained. ''Competition is tough and the young are the ones who have the advantage. If you look old, you do not have credibility.''
