"His prescription is unusual, so it's a really good indication," Minto said of the find. "Matt has a really bad astigmatism. Without glasses, he can see about as far as an arm's length."
Minto said a hiker contacted him after finding the glasses on a day hike about a mile out of town. The hiker knew about the search for Greene and thought the glasses looked similar to the ones he wore.
People have pooled their resources and time to help the family search. Ron Minto said that volunteers have offered the use of a helicopter and plane flyovers as well as high definition cameras.
"The outpouring of prayers, love and concern that people have shown, it restores your faith in mankind," Greene's mother, Patricia Greene told ABCNews.com. "Most of these people never met Matt. They don't know him, but they're giving their knowledge, expertise and time [to find him]. We're thankful for every one of them."
Still, the high altitude and difficult terrain pose challenges in the search.
"We understand it's an extremely dangerous terrain and the risks that are involved. It's been over 30 days," Ron Minto said. "There are crevasses in glaciers, where the ice is melting. They can open up and swallow you and no one would ever be seen again. "
Still, they remain hopeful for his safe return.
|"Matt is in top physical condition," he said. "Most likely, there is plenty of water out there. If anybody could survive, Matthew could."|
"We're still holding out. Miracles do happen," Patricia Greene said. "Whatever the outcome, we just want him found and brought home."
Green is 5'11" and 155 pounds, with brownish-blonde short hair and blue eyes. Anyone with information about his whereabouts should contact the Mammoth Lakes Police Department or Mono County Sheriff's Office.