RESUMO
On the Aulhorn phase-difference haploscope retinal rivalry was stimulated by using different optotypes for each eye. Physiological suppression could not elicited at will by changing attention from one eye to the other. The majority persons tested showed a preference for one eye.
Assuntos
Atenção/fisiologia , Retina/fisiologia , Visão Binocular/fisiologia , Percepção Visual/fisiologia , Humanos , Testes Visuais , Acuidade VisualRESUMO
Physiological suppression was studied in 25 subjects using the Aulhorn phase-difference haploscope (PDH). To control fixation the eye movements were registered by means of an infra-red reflection technique.
Assuntos
Percepção Visual/fisiologia , Movimentos Oculares , Fixação Ocular , Humanos , Visão BinocularRESUMO
We compared a group of 25 Pearce posterior chamber lens implants with a group of 10 Binkhorst iridocapsular lens implants. Two methods of pre-operative intra-ocular lens power determination were compared. A formula based on geometrical optics was used and a linear regression method. The pre-operatively calculated lens power was compared with the real implant power corrected for post-operative refraction. Results showed that the Pearce lens was about 4.3 diopters stronger than the average iridocapsular lens. Using the optical method, the final inaccuracy of the prediction, namely 1.5 diopters, could be completely explained by the inherent inaccuracies of the measuring system.
