 Sight Sciences Inc. is now set to go public at a valuation of more than 1 billion, after the expected pricing and number of shares to be offered in the California-based ophthalmology and optometry companys initial public offering were increased. The company is now looking to raise 240 million, up from 160.54 million previously, as the company is now offering 10 million shares in the IPO, which is now expected to price between 23 and 24 a share. 