INVERSION MARKING FOR CONTACT LENSES

摘要

Ophthalmic lenses becoming invisible when being placed on eyes and integrated with inversion markings which are clearly identified and high-visible, can be used for easily differentiating a normal state and an inversion state. The lenses include a thin material layer changing its optical state from light scattering or color or both of them to an invisible transparent state by a corneal temperature or effects of surrounding light or the combination of both of them.