I'm on my second pair of varifocals, this time from Boots and the first pair from Specsavers While they are very convenient and saves having to carry a second pair round with you neither the distance or reading areas are as good as single lens glasses. I also cannot wear them on two wheels, either bike or motorcycle. They are great in the car where you are only moving your eyes side to side, but on bikes there is a lot of up and down eye movement as well and the eyes don't adjust quickly enough. On a fast bumpy descent they are murder because they tend to bounce around giving a blurred vision.
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My eyes... 
My eyes... 