Just wondrin' how you're doing? Have you had the vitrectomy now? All ok, so far?
I know what place you're coming from with 42 years of the big D myself, so, yes, quite a few years of bad control with no blood testing available (& childhood/teen years with crazy lifestyle & very bad control followed by struggles with various eating disorders since). I started pumping and been trying hard since PDR diagnosed but all takes its toll from those many crazy years...
Lifting furniture, unless very light, a definite no-no. I was advised not to lift anything moderately heavy, including boxes, shopping, furniture...and with yoga I'm careful with any posture where my head is lower than my heart. So e.g. I do downward dog by elevating upper half of my body first - 2 blocks under each hand - and not holding anything too long if I sense any pressure building up in my head (worse in hot weather). Standing forward bend only to ~90 degrees. Defo not ever shoulder or head stands. It's a right pain having to avoid or adapt poses, and I do sometimes get tempted to give something a go briefly, like plough, but know I shouldn't risk it really.
I'm hoping it's good news so far, fingers crossed.