Never make significant, overwhelming adjustments to your eyewear at once. Instead, start with tiny adjustments. Then, continue making minor adjustments until you find the perfect fit.
The eyewear sits too deep or too high.
If your specs sit high, softly press out on the flexible nose cushion. Perform this on both sides until they are the desired height.
If specs sit low, use a hairdryer four inches from the frames for approximately thirty seconds. Then push the left side and right side closer to the nose.
Metal or wire frames
If your eyewear is relatively HIGH, slowly press out on the pliable proboscis pad until they are at the desired height.
If the eyewear is relatively low, run your blow dryer four inches above the specs bridge for roughly 30 seconds. Then lean the right aspect and left aspect closer to the nose.