The 25 Most Valuable American Startups That Died In 2018

9. ReVision Optics — surgical implants for vision loss

Year founded: 1996

Maximum valuation: $183 million

Amount raised: $175 million

Read more about ReVision Optics on PitchBook.

8. Medical Simulation — simulation products for medical training

Year founded: 1998

Maximum valuation: $194 million

Amount raised: $55 million

Read more about Medical Simulation on PitchBook.

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