Production method of optical film, optical film and image display

A method for producing an optical film, comprising:

• simultaneously coating two separate coating solutions over a transparent support, wherein the two coating solutions are a lower layer coating solution to be coated on a transparent support side and an upper layer coating solution to be coated on an outermost surface side, and the two coating solutions each contains a solvent and a solute;
• and
• drying the solvent in each of the two coating solutions to provide two optical layers,
• wherein
• the main component of the solute in the lower layer coating solution is insoluble or sparingly soluble in the main component of the solvent in the upper layer coating solution,
• the main component of the solute in the upper layer coating solution is easily soluble in the main component of the solvent in the lower layer coating solution,
• the main component of the solute in the lower layer coating solution is at least one of a bifunctional or greater functional polymerizable monomer and oligomer, and
• a ratio of a wet coated amount of the upper layer coating solution to a wet coated amount of the lower layer coating solution is from 1/1 to 1/50.