A vision care device comprises a light source device (1) and a control unit (2) connected thereto. The light source device (1) flashes at a fixed vibration frequency of a crystalline lens under the effect of the control unit (2), so that the crystalline lens exercises effectively by generating resonance under the effect of a flashing light source (11), thereby recovering or improving the refraction capability, and lowering the aging speed. In this case, fine adjustment amplitude is achieved under the effect of ciliary muscle, thereby fundamentally solving the problem of vision correction. A method for determining the fixed vibration frequency of a crystalline lens is further provided. A determining unit (4) formed of a flashing light source (11) and a vibration sensor for measuring the vibration frequency and amplitude of the crystalline lens is used for determining. In this method, the vibration of the crystalline lens is aroused by providing the flashing light source (11), and the flashing frequency is adjusted to obtain the light source flashing frequency during the resonance of the crystalline lens, thereby determining the fixed vibration frequency of the crystalline lens. The method is simple, reliable, and easy to implement.La présente invention concerne un dispositif de soins ophtalmologiques qui comprend un dispositif source de lumière (1) et une unité de commande (2) y étant raccordée. Le dispositif de source de lumière (1) clignote à une fréquence de vibration fixe dun cristallin sous leffet de lunité de commande (2), de telle manière que le cristallin sexerce efficacement en générant une résonance sous leffet de la source de lumière clignotante (11), permettant ainsi la récupération ou lamélioration de la capacité de réfraction, et réduisant la vitesse de vieillissement. Dans ce cas, une amplitude dajustement fine est obtenue sous leffet du muscle ciliaire, résolvant ainsi fondamentalement le problème de correction de la vision. La présente invention conc
