Abstract: An object of the present invention is to find a useful means for removing an intraocular membrane. The present invention relates to an agent for use in intraocular membrane peeling surgery, which contains a solution containing a hydrogel-forming material and satisfies the following formula 1 with respect to the dynamic viscoelasticity measured at a temperature of 25 to 40° C. and a frequency of 1 Hz. 0<Vmax?3??(Formula 1) Provided that in the formula 1, Vmax (Pa/sec) is the maximum change rate of the storage elastic modulus after the initiation of gelation.

Abstract: [Problem] The purpose of the present invention is to provide a neuroprotective agent which is capable of effectively protecting intraocular cells including optic nerves and is effective as a composition for ophthalmic membrane staining in cases where removal of an ophthalmic membrane is carried out. [Solution] The purpose is achieved by a neuroprotective agent which contains, as active ingredients: Brilliant Blue G, a pharmaceutically acceptable salt thereof or a harmaceutically acceptable solvate thereof; and triamcinolone acetonide, a pharmaceutically acceptable salt thereof or a pharmaceutically acceptable solvate thereof. This neuroprotective agent has ophthalmic membrane staining effect due to BBG and exhibits extremely high neuroprotective activity due to synergetic effect of Brilliant Blue G and triamcinolone acetonide.

Abstract: A staining composition for staining an ophthalmic membrane when performing the ophthalmic membrane removal, wherein the staining composition comprises a Brilliant Blue G (BBG) derivative as a primary component.

Abstract: A staining composition for staining an ophthalmic membrane when performing the ophthalmic membrane removal, wherein the staining composition comprises a Brilliant Blue G (BBG) derivative as a primary component.