DALLAS-Riata Capital Group (RCG), a Dallas-based private equity investment firm, said Monday that it has closed a General Partners-led secondary transaction for its portfolio company AEG Vision, an owner and operator of more than 235 eyecare practices throughout North America. The transaction allows RCG to return capital to certain existing investors while providing AEG with substantial growth capital to execute its long-term strategy as it enters a new phase of growth under RCG's guidance, the announcement noted.