So what you are really talking about is a future headset from Apple, that could come with self adjusting lenses, so if you are near sighted, then this future headset could replace the need for that user to purchase additional lenses for Apple's headset. Anyone purchasing Apple's Vision Pro headset will need to purchase lenses that will fit inside Apple's headset, which is an additional cost. Where as a number of other headsets, currently allow their users to wear their existing glasses, like the Quest 2, which don't require their users to purchase separate lenses. Since Apple's headset requires glasses wear individuals to purchase separate lenses, then the cost of Apple's Vision Pro headset is going to cost a couple hundred more, because you need your prescription lenses in order to use Apple's headset.