In a ray diagram for a thin converging lens, a ray that is not parallel to the optic axis but passes through the optic center will

If a ray of light passes through the optic center of a thin converging lens, it will pass through undeviated. This is because the optic center is the point on the lens where the principal axis crosses and it is equidistant from the lens surfaces. Therefore, any ray of light that passes through the optic center will not be refracted or deviated because it is passing through the center of the lens and hitting the surface perpendicularly. A converging lens is thicker in the middle than at the edges and refracts light rays in such a way that they converge at a focal point on the opposite side of the lens. Rays that are not parallel to the principal axis will converge at a point on the opposite side of the lens after refraction. However, if the ray passes through the optic center, it will not bend or deviate from its original path and will pass through undeviated. Therefore, if a ray of light is not parallel to the optic axis but passes through the optic center of a thin converging lens, it will pass through undeviated.