New eyegoggles always lead to altered perceptions, in my experience...my first bifocals about 10 yrs ago moved the floor into another dimension, then getting a new non-bifocal pair for driving seemed to put me about 10 feet over the the road surface...the most bizarre change came a few months back with a new script for dark brown sunglasses w/bifocals, put a 3-D halo around everything (blue halo at the top, red at the bottom) for a couple of days...
Don't worry, it'll become normal in a while, just avoid stairs & carnival funhouses until your brain finally believes what your eyes are telling it...

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