An adhesive composition comprising: a (meth)acrylate-based copolymer having a refractive index measured using an Abbe Refractometer of at least 1.48, wherein the (meth)acrylate-based copolymer comprises a copolymer of an aromatic monomer in an amount of at least 5 parts by weight per 100 parts by weight of total monomer, the aromatic monomer having the formula: wherein: Ar is an aromatic group which is unsubstituted or substituted with a substituent selected from the group consisting of Br y and (R 3) z wherein y represents the number of bromine substituents attached to the aromatic group and is an integer from 0 to 3; R 3 is a straight or branched alkyl of 2 to 12 carbons; and z represents the number of R 3 substituents attached to the aromatic ring and is an integer from 0 to 1, provided that both y and z are not zero; X is oxygen, sulfur or -NR 4 -, wherein R 4 is H or C 1 -C 4 alkyl; n is 0 to 3; R 1 is an unsubstituted straight or branched alkyl linking group of 2 to 12 carbons; and R 2 is either H or CH 3; particles of a thermoplastic polymer, at least some of the particles having an average particle size measured by optical microscopy that is larger than the wavelength of visible light, wherein the adhesive composition is optically transparent having a visible light transmission of greater than 85% and a haze of less than 10% as measured by ASTM D1003. a (meth)acrylate-based copolymer having a refractive index measured using an Abbe Refractometer of at least 1.48, wherein the (meth)acrylate-based copolymer comprises a copolymer of an aromatic monomer in an amount of at least 5 parts by weight per 100 parts by weight of total monomer, the aromatic monomer having the formula: wherein: Ar is an aromatic group which is unsubstituted or substituted with a substituent selected from the group consisting of Br y and (R 3) z wherein y represents the number of bromine substituents attached to the aromatic group and is an integer from 0 to 3; R 3 is a straight or branched alkyl of 2 to 12 carbons; and z represents the number of R 3 substituents attached to the aromatic ring and is an integer from 0 to 1, provided that both y and z are not zero; X is oxygen, sulfur or -NR 4 -, wherein R 4 is H or C 1 -C 4 alkyl; n is 0 to 3; R 1 is an unsubstituted straight or branched alkyl linking group of 2 to 12 carbons; and R 2 is either H or CH 3; Ar is an aromatic group which is unsubstituted or substituted with a substituent selected from the group consisting of Br y and (R 3) z wherein y represents the number of bromine substituents attached to the aromatic group and is an integer from 0 to 3; R 3 is a straight or branched alkyl of 2 to 12 carbons; and z represents the number of R 3 substituents attached to the aromatic ring and is an integer from 0 to 1, provided that both y and z are not zero; X is oxygen, sulfur or -NR 4 -, wherein R 4 is H or C 1 -C 4 alkyl; n is 0 to 3; R 1 is an unsubstituted straight or branched alkyl linking group of 2 to 12 carbons; and R 2 is either H or CH 3; particles of a thermoplastic polymer, at least some of the particles having an average particle size measured by optical microscopy that is larger than the wavelength of visible light, wherein the adhesive composition is optically transparent having a visible light transmission of greater than 85% and a haze of less than 10% as measured by ASTM D1003.