After vanishing more than a month ago in the Mammoth Lakes, Calif. region, the search continues for Nazareth math teacher Matthew Greene, a graduate of Lehighton Area High School with family in Franklin Township.

A pair of glasses, called "strikingly similar" to Greene's glasses, was found this weekend but a professional examination revealed that they likely did not belong to the missing hiker."They do not believe that they were Matthew's," said Patricia Greene, Matthew's mother. "They're not a prescription lens. They were bought over the counter."The glasses were found hanging on a sign at a trailhead leading to the northern Inyo crater, north of Greene's last known locations near Mammoth Lakes, Calif.Greene was first reported missing on July 29 by the Mammoth Lakes Police Department. He arrived in the Mammoth Lakes area around June 27 to "hike, climb, and conquer peaks in the Eastern Sierra," according to a press release. He last talked to family members on July 16.The majority of search efforts have been focused to the west of the Inyo craters, at popular hiking spots like Mount Ritter and Banner Peak. These areas were chosen because the maps to this area were torn out of his guide book. Greene tended to tear pages out of his guide book before hikes, then return them to the book once he had completed the hike.Volunteer search and rescue teams have combed the area, and in addition to a physical search, volunteers have examined park permits and summit registers and contacted those who recently signed these registries.Hikers and park visitors are encouraged to register with the wilderness office, and hikers and climbers tend to sign a summit registry upon completing their climb.The family has launched a nationwide campaign to find people who may have seen or spoken with Greene. Because his car was in an auto shop for repairs when he went missing, it's speculated that he received a ride to a trailhead to climb.Greene was traveling with friends, but stayed behind while waiting for his car to be repaired. When these friends did not hear from him, they contacted police, who discovered that Greene's car was not picked up and he had left gear at the Shady Rest campground. His cell phone is thought to be dead, damaged, or out of signal range.Examination of his gear indicates that he was prepared for a day trip. His overnight equipment was left at his campsite.Patricia Greene was unable to comment further on search efforts, but directed those looking for more information to

www.supertopo.com. Information is also being posted on social networking sites such as Facebook and Twitter.More than 10,000 people have liked the Facebook page "Find Matt Greene," from hikers involved with the search or familiar with the hobby to local classmates, co-workers and students praying for his return."I'm very thankful for all of the people who don't even know Matt, who are looking for him and praying for him," said Patricia Greene. "It's kind of overwhelming, the number of people involved with this."Anyone with information about the whereabouts of Matthew Greene is asked to contact the Mammoth Lakes Police Department at (760) 934-2011 or the Mono County sheriff's office at (760) 932-7549, extension 7.