Flawless vision should be simple. Yet, wearers still encounter limitations even with premium progressive lenses such as: 'I feel wary when going down the stairs'; 'When I move my head, I feel everything moves and yet nothing should move'; 'I need to constantly move my head to target what I am looking at'.
These limitations are due to the fact that progressive lenses are based on a compromise between wide fields of vision and limited swim effect. Very few articles can be found dealing with the link between field of vision and the line distortion that causes the swimming effect and have their limitations.1,2
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