A desktop electronic magnifier in a first embodiment includes a monitor and a control panel mounted to the monitor so that access to the control panel cannot be blocked by any position of the monitor. The apparatus also includes an instrumentation component that causes instrumentation logic to be transmitted to the client computing device responsive to receipt of the request for the application data. The assembly system includes a seat box having a rectangular frame defining an accessible internal cavity covered by an upper support surface. A lever on the lower surface of the seat member operates a pneumatic lift assembly that extends and retracts the telescoping leg to adjust the height of the seat member. The second lens has a third principal plane and a fourth principal plane. The light guide film is a light guide film with a light scattering property in which particles with a scattering property are mixed, and each of the scattering layer and the light guide film has a property of scattering incident light while substantially maintaining a polarizing state thereof.