Gyorgy BODI, Alexandra LAZAR, Mihaela Baritz, Daniela BARBU, Angela REPANOVICI


The cornea deformation due to the keratoconus pathology has represented a real clinical challenge for specialists in the field of ophthalmology to find the best method to eliminate, minimize or just improve as much as possible the effects of this pathology on the visual function. That is why a series of solutions have been sought over time to be able to ensure visual comfort, good and long-lasting vision for these subjects/patients, using different investigative procedures and/or different intervention methods. One of these forms of vision improvement in the case of some subjects/patients with keratoconus forms or low/medium myopia is represented by the rigid contact lens for orthokeratology. In the first and second part of this paper, the general aspects related to the construction of the contact lens for orthokeratology are presented, as well as the theoretical foundation related to the behavior of the ortho-k lens in contact with the cornea, tear film assembly. The third part of the paper presents the analysis model of this assembly and the application of the methodology for ensuring visual comfort for a sample of subjects by using the ortho-k lens in cases of low and medium myopia. The final part of the paper presents the results of these experimental studies as well as the conclusions on the efficiency of using the ortho-k lens.

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