[Indications for optimized refractive keratoablation. Communication 2. Dependence on baseline spherical aberrations]

The authors made a detailed comparative analysis of the aberration pattern of patients before and after aspheric individualized keratoablation (ORK-CAM) and the LASIK operation by routine technology, by taking into account the magnitude of 4th-order spherical aberration. Investigations were made in 2 groups: 1) 20 patients (39 eyes) who had undergone routine ablation (a study group); 2) 19 patients (38 eyes) who had aspheric individualized keratoablation (a control group). The detailed comparative analysis of the aberration pattern in patients after eximer laser correction by different technologies yielded major criteria predetermining the choice of an eximer laser correction technology. Indications for routine and individualized aspheric keratoablation are defined. Further studies of the impact of high-order aberrations on different visual functions are required to solve the vexed questions whether it is aberrationally expedient to choose laser correction. Ophthalmo-ergonomic studies should be also performed to provide a clinical verification of the consistency of the proposed concept of the indications and the choice of the optimal technology of eximer laser correction.