The subject invention relates to a scratch-resistant optical film, which comprises: (a) a transparent substrate having a first surface and a second surface; (b) a diffusion layer on the first surface of the substrate, which has a convex-concave structure and is comprised of a first hard coat layer comprising organic particles; (c) a scratch-resistant layer on the second surface of the substrate, which is comprised of a second hard coat layer; wherein the organic particles in the first hard coat layer are formed from a polyacrylate resin which comprises at least one multi-functional acrylate monomer as polymerization units, said multi-functional acrylate monomer being in an amount from 30 to 70 wt % based on the total weight of the monomer used, and wherein the organic particles have a single mean particle size and have a particle size distribution in the range within about ±5% of the mean particle size.