Avedro Inc. squeaked out the door with its IPO. It managed to raise $70 million, rather than the $75 million it had previously proposed, after pricing at the bottom of its $14 to $16 per share range. The ophthalmic med-tech company held the number of shares steady at the proposed 5 million. Still, shares (NASDAQ:AVDR) slipped by about 12 percent to $12.25 in early trading.