Optical-frame maker Sun Hing Vision expects the launch of titanium frames to boost its turnover by about 20 per cent within three years. Chairman and managing director Otis Ku Ngai-yung said the new frames, which are undergoing trials, would have much higher profit margins. 'But the actual figure, of course, would depend on demand in the market,' he said after the company's annual general meeting yesterday. To increase margins further, Sun Hing would aim to provide more value-added services to customers. Mr Ku was optimistic about the future of the eyewear industry because demand for spectacles was likely to increase in developed countries due to ageing populations. In Europe and the United States, where people were more aware of the harmful effects of ultraviolet rays, there would be a continual increase in demand for sunglasses. In the financial year to March 31, the US accounted for 82 per cent of the company's sales, with Europe making up 14 per cent. Attributable profit rose by 57.2 per cent to $41.8 million, on turnover of $190.1 million. Between 1996 and last year, Hong Kong's exports of optical goods rose 20.2 per cent. Mr Ku said he was convinced the growth was sustainable. MEETINGS