A person on oxygen only sleep with it sometimes has red eyes still smokes and mean can't breath walking will body shut down?

A person who still smokes and is on oxygen? They obviously have some sort of instant death wish still smoking.

This will be moved, as its not a question pertaining to vision.

It is now in medical

First if they smoke while using O2, they have a very good chance to setting the condenser on fire, The fire often travels up the tube to the machine.

Also what ever illness requires the o2 will also be harmed by the smoking

From the sounds of it, the person doesn't use the oxygen WHILE smoking, just while sleeping.

But I agree, if the person has an illness requiring o2, they smoking will only make this worse... fast.