The protection device (1) for eyes according to the present invention comprises: an at least partially transparent structural lens (3) with at least one
liquid crystal layer (8) with variable transparency applied; a photovoltaic
cell (51) for activating the
liquid crystal layer, frontally covered by an at least partially transparent element (3,31). Such device is characterized in that the at least partially transparent element (3,31) has a covering area (91) with mirroring treatment (9) in front of the photovoltaic
cell (51), and the structural lens (3) has a vision area (90) devoid of mirroring treatment (9) and / or with mirroring treatment with a lower reflected light percentage than the covering area (91). This device is high in aesthetic
impact due to the presence of mirroring treatment covering at least the
photovoltaics, which is slightly or not at all visible to an outside observer.