Abstract: Provided is a gel material for ophthalmic treatment useful as a synthetic vitreous body which is a novel intraocular tamponade material having a low swelling pressure, an appropriate elastic force, and no toxicity to ocular tissues, specifically, to retinas, and which is capable of stably maintaining a long-term stable tamponade effect. A gel material for ophthalmic treatment including a hydrogel in which a gel precursor cluster crosslinks to form a three-dimensional network. The gel precursor cluster has a structure with crosslinked monomer units or crosslinked polymer units present at concentrations less than a critical gelation concentration, and the gel precursor cluster has a relationship of G?<G? where G? represents a storage elastic modulus and G? represents a loss elastic modulus. The hydrogel has a polymer content of 50 g/L or less, a storage elastic modulus G? of 1 to 10,000 Pa at a frequency of 1 Hz, and a fractal dimension of 1.5 to 2.5.

Abstract: Provided is a gel material for ophthalmic treatment useful as a synthetic vitreous body which is a novel intraocular tamponade material having a low swelling pressure, an appropriate elastic force, and no toxicity to ocular tissues, specifically, to retinas, and which is capable of stably maintaining a long-term stable tamponade effect. A gel material for ophthalmic treatment including a hydrogel in which a gel precursor cluster crosslinks to form a three-dimensional network. The gel precursor cluster has a structure with crosslinked monomer units or crosslinked polymer units present at concentrations less than a critical gelation concentration, and the gel precursor cluster has a relationship of G?<G? where G? represents a storage elastic modulus and G? represents a loss elastic modulus. The hydrogel has a polymer content of 50 g/L or less, a storage elastic modulus G? of 1 to 10,000 Pa at a frequency of 1 Hz, and a fractal dimension of 1.5 to 2.5.