To provide: a curable resin composition which can be continuously produced without gelling during production, and has excellent basic performances such as heat resistance and moisture resistance; an optical member which has excellent optical characteristics such as high transparency and exhibits excellent performances in a harsh use environment; and a method for controlling an optical material. A curable resin composition including an organic resin component and a metalloxane component, wherein the organic resin component includes a resin component having an Abbe number of 45 or more and the metalloxane component has a metalloxane bond; an optical material comprising the above-mentioned curable resin composition; an optical member produced by curing the optical material; and a method for controlling an Abbe number and/or a refractive index of an optical material.