The monomer for producing the ophthalmic device

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PROBLEM TO BE SOLVED : To provide silicone monomers which include silicon atoms, have excellent compatibility with (meth)acryl monomers, in particular, fluorine substituent-containing (meth)acryl monomers imparting stain resistance, and are suitable as ophthalmic monomers.SOLUTION : The present invention provides monomers represented by the formula (1), and methods for producing the compounds. (m is an integer between 2 and 10; n is 1 or 2; Ris a C1-4 alkyl group; and Rare each independently H or a methyl group.)