Israeli Prime Minister Ariel Sharon opened his eyes twice on Monday after family members played a tape of his grandson's voice, aides said, raising hopes the 77-year-old stroke victim may be emerging from a coma. But Hadassah hospital, where Sharon has been treated since suffering a massive stroke on January 4, said relatives observed "eyelid movements" whose medical significance was unclear. "(Sharon's son) Gilad brought in a cassette with the voice of Rotem, his eldest grandson, speaking to him, and he opened his eyes twice, each time for two or three minutes," one aide said. "They believe it was so short because he is still fuzzy from anesthesia yesterday," the aide said, referring to the tracheotomy, the insertion of a tube into Sharon's windpipe to help him breathe, that surgeons performed on Sunday. "But the doctors didn't see it, so it is hard to determine whether it is serious or whether they are just getting their hopes up."