Optical film, laminated film, and touch panel

An optical film comprising:

• a substrate film;
• and
• an adhesion-facilitating layer arranged on at least one surface of the substrate film,
• wherein the adhesion-facilitating layer contains a resin, silica particles, and metal oxide particles other than the silica particles;
• in a case where, in a vertical cross section of the adhesion-facilitating layer, a region to a height corresponding to 50% of an average film thickness of the adhesion-facilitating layer from a substrate film side of the adhesion-facilitating layer is defined as a lower region, and a region excluding the lower region of the adhesion-facilitating layer is defined as an upper region, a ratio of a percentage A of an area derived from the metal oxide particles in a total area of the lower region to a percentage B of an area derived from the metal oxide particles in a total area of the upper region is 1.05 or more;
• and
• the surface of the adhesion-facilitating layer opposite to the substrate film side has an arithmetic mean roughness Ra of 10 nm or more and less than 20 nm.