Why are those who do Feng Shui calculations blind?

Not necessarily, many Feng Shui masters are not blind.

How to read faces if you are blind.

It is difficult to calculate accurately if you only know how to calculate the horoscopes and do not need to verify it with facial or palm readings.

The blind ones are usually street Feng Shui masters, either cheating money or trying to make ends meet. Those people talk casually and treat it as a secret.