as such there are not much restrictions  but to be on safer side one must avoid exposure to bright light gas and dust etc.you must not use the old specs.

I presume you had phacoemulsification. What you need to remember is that the wound needs a few days to seal. There is a risk of infection before it does so. I don't believe kitchen gas is detrimental in any way. As for glasses they are just aids ...if you feel that the old glasses help go ahead and use them till the new ones are prescribed.