Cataract produces changes in patient's compensation which depend on severity and type of cataract. For nuclear and PSC cataract, we observed that the higher the grade of severity, the greater the myopic shift. Power astigmatic changes were found in cortical cataract and axis changes in PSC and nuclear cataract.
ABSTRACT:It is well-known the advantages of measuring chromatic and achromatic contrast sensitivity for detecting pathologies. But these measurements are rarely used in clinical practice, due the complexity of the measurements and the examinator specialization. In fact, there is not a complete characterization of the response of the visual pathways to achromatic and chromatic spatio-temporal frequency stimuli. We have designed a new experimental device that facilitates these measurements and allow us to characterize the visual response in healthy patients. In this paper, we evaluated the responses of the visual pathways in healthy patients.Key words: Magnocellular, Parvocellular, Koniocellular, Visual Field, Contrast Sensitivity, SpatioTemporal Stimuli.
RESUMEN:Aunque son bien conocidas las ventajas que presenta medir la sensibilidad al contraste cromática y acromática del sistema visual para la detección de patologías, esta práctica es poco utilizada en la clínica habitual por la complejidad actual de la misma y por la especialización que debe tener el personal para su realización. De hecho, no existe una caracterización completa de la respuesta de las vías visuales a estímulos cromáticos y acromáticos de frecuencia espacio-temporal variable. Se ha diseñado un nuevo dispositivo experimental que facilita estas mediciones , para caracterizar la respuesta visual en pacientes sanos con este dispositivo. En este trabajo se evalúan las respuestas de las vías visuales de pacientes sanos.
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