Fidelity Management and Research Company has marked up the value of its stake in Lenskart by 12%.The valuation of Lenskart now stands at $5.6 billion.Fidelity's stake in Lenskart is valued at $32.97 million, up from $29.44 million in July.Lenskart raised $200 million in secondary investment from Temasek and Fidelity in June, valuing the company at $5 billion.