The recommendation against watching TV is not, as I understand it, because it shortens the attention span, but because it overloads the mind. A small child is not mentally capable of processing so much visual input and will be overwhelmed.
We have ceiling fans in all our rooms. Our 2 months old baby keeps on staring at the fan when lying on her back.
Considering the above quote is watching a moving fan equally harmful to an infant's mental development as is a TV?
If yes, what could be the preventive measures?