A lens module includes a lens barrel, at least one fixed focus lens fixed in the lens barrel, and at least two variable focus lenses fixed in the lens barrel. Each variable focus lens includes two electrodes and an electro-optical material between the electrodes. Each electrode is electrically connected to a voltage supply so as to be able to selectively apply a voltage to the electro-optical material and to thus selectively control the refractive index of that material. By changing the refractive index, a concordant change in the focus of a given variable focus lens is possible, without modifying the position and/or shape thereof.