** Shares in Carl Zeiss Meditec AG AFXG.DE rise around 6% after Goldman Sachs upgraded the German optical systems maker to "buy" from "neutral"
** GS analyst Richard Felton cites positive developments in the Chinese market, which shows signs of stabilization
** Felton projects an increase in H2 revenue in thanks to the approval in China of Visumax 800, a laser device used by surgeons
** Including today's rise the stock has gained 36.75 % YTD; it lost 4% on Monday after J.P.Morgan placed it on negative catalyst watch
(Reporting by Simon Ferdinand Eibach)
((Simonferdinand.eibach@thomsonreuters.com))