A magic eye only conveys remote control commands back to the Sky box. It will actually work without being connected at all to any TV.
A Sky+ box's RF output can be used by any TV that has an analogue tuner. However a Sky+ box's default RF output channel is 68, which is beyond the tuning range of many recent TVs, because channels 51 to 68 are now used for cellular transmission. In those cases the Sky box's RF Output Channel would have to be changed to one somewhere below channel 50
