PPG Industries' optical and specialty materials business, which includes Transitions Optical, increased fourth quarter sales by 10 percent to $268 million, while earnings grew by 21 percent to $57 million. The bottom line profited from higher sales volumes, although it its selling and advertising costs went up to support sales growth. Transitions lenses and adjacent products improved market penetration and posted a 20 percent increase in emerging regions. The division helped PPG register a record fourth quarter with group sales up by 8 percent $3.4 billion. Reported net income increased to $205 million from $142 million a year earlier, but adjusted net earnings were slightly higher, reaching $207 million against $144 million.