WAYLAND, Mass., Dec. 19 -- Candela Corp., a developer and manufacturer of aesthetic laser solutions, has received authorization from its board of directors to extend its open market stock repurchase program to allow for the purchase of up to 500,000 additional shares of common stock. Purchases will be transacted on The NASDAQ at current open market prices and will be paid for with general corporate funds, the company said. These shares are in addition to the 750,000 shares that were repurchased by the company under a program last year.