ForSight Vision4, the fourth vision technology startup incubated by ForSight Labs, has brought in $6 million in venture capital, reports VentureWire. While no investors in this recent round were named, the firm's past companies have been backed by Morgenthaler Ventures, Split Rock Partners and Versant Ventures.

Based in Menlo Park, Calif., ForSight Labs has spun off four companies to date, each focusing on technology and devices used to provide advanced eye care. Its first company, glaucoma treatment device maker Transcend Medical, raised $9.4 million; its second, ForSight NewCo, raised $5 million in 2006 for drug delivery systems before selling to QLT for $42 million last October; and its third company, the stealthy ForSight Vision3 took in $12 million.

ForSight Labs itself spun out of The Foundry in 2005.