The cornea of the human eye has a certain curvature and the sunglass lenses also have a certain curvature. When the two curvatures are parallel or relatively close to each other, there is no extra luminosity that can cause dizziness. When the lenses of sunglasses are too arched (too curved), wearing them in front of the eyes can cause additional diopter, which can cause dizziness. Some sunglasses may be manufactured with thin lenses and high frame pressure on the lenses, causing the center of the lenses to arch and produce luminosity, causing dizziness. nThere are also some customers who are allergic to heavier sunglasses (mainly the nerve at the bridge of the nose) and can also feel dizzy.