Why does the OP need varifocals, he's not describing short sightedness is he, just long sightedness. Varifocals correct both sorts of visionI had reactolite or whatever the optician calls them and found them a menace on some roads. Coming down the hill for example into Rosemarkie which has overhanging trees I found that coming into shade I was totally blind and the left hand side has or had lots of large potholes. That is only one example but I ditched them for cycling pdq.
I never had varifocals but I would be very cautious about spending much until I was sure they worked as intended.