A virtual reality device, comprising an optical system. The optical system includes a left lens and a right lens, the left lens comprises a first falcate negative spyglass (2) and a first biconvex positive spyglass (3) which are co-axially mounted and which are sequentially ranked in the direction from the light incidence to the human eyes, and the right lens comprises a second falcate negative spyglass (2) and a second biconvex positive spyglass (3) which are co-axially mounted and which are sequentially ranked in the direction of the light incidence. A lens is formed by combining the spyglasses, which can effectively reduce the degrees of chromatic dispersion and imaging distortion, and in particular, largely reduce the chromatic dispersion and distortion of edge imaging.