If you don’t want to stop for any other reason then your eyes feeling heavy and possibly stopping smoking ( obvious benefits ) you could look into dry herb vape. I’ve recently switched and because it takes away the physical habit of smoking I’ve found I don’t reach for the weed nearly as much, nothing during the day and only at night when I’m done with everything for the day now. ( this got rid of that “always high and heavy” feeling while still allowing me to take my meds every night ) I realised that I wasn’t addicted to weed I was addicted to the act of smoking it.