The Kaiser Permanente-backed Transcend, which develops devices to treat glaucoma, has now raised $73m since it was founded in 2005.

US-based medical device producer Transcend Medical has completed a $22m series C round from existing investors and an undisclosed global pharmaceutical and medical device company.

Although it did not explicitly name which investors took part in the round, the company’s existing backers include Kaiser Permanente Ventures, the corporate venturing unit owned by care consortium Kaiser Permanente, which backed Transcend’s $16m series B round in 2012 alongside venture capital firms Investor Growth Capital and Finistere Ventures, and Transcend’s series A backers.