C.J.
At 7 months old - he is learning about the world around him and glasses pulling and hair pulling is part of that process.
do not react when he pulls off the glasses or pulls the hair just pull it back or take the glasses away and offer something else instead. At 7 months they are not at an age where they are going to seriously comprehend that they aren't supposed to pull on things on your face, so just be prepared or take precautions - contacts/old glasses/pony tails :)
good luck.