AqueSys, a startup developing a device to treat glaucoma, has closed on $9 million in new funding, PE Hub reported Thursday.

AqueSys, which had raised $6.9 million in earlier financing, received investments from AMV Partners, Carlyle Ventures and SV Life Sciences, according to a regulatory filing.

The focus of the company is a device that uses a soluble duct to reduce inner eye pressure, according to Thomson Financial.