Efeitos da constrição pupilar na perimetria de freqüência dupla em olhos normais

Purpose: To study the effects of pupillary constriction on frequency doubling perimetry in a group of normal subjects. Methods: Eighteen healthy volunteers participated in the study. Only one eye per patient (right eye) underwent frequency doubling perimetry (Full Threshold C-20 strategy). For the second session, one drop of 2% pilocarpine was administered to the volunteers' right eye and the examination was repeated after 60 minutes. Results: Sixty minutes after administration of 2% pilocarpine, there was a significant reduction of the pupillary diameter from 4.22 ± 0.17 mm to 1.55 ± 0.51 mm (p<0.05). There was a significant reduction of the mean retinal sensibility after pupillary constriction. The threshold sensitivity of the central 5º worsened by 5.67 ± 2.49 dB; the area between 2.5º and 10º worsened by 4.49 ± 2.73 dB; and the area between 10º and 20º worsened by 5.10 ± 3.55 dB (p<0.01). A reduction of 4.06 ± 2.67 dB was observed in the mean deviation, as well as an increase of 0.64 ± 0.94 dB in the pattern standard deviation (p<0.01). No differences were observed regarding the number of fixation losses, false-positive and false-negatives responses, and duration of the examination. Conclusion: Changes in pupillary diameter may produce significant declines in threshold sensitivities of the 20º visual field tested by frequency doubling perimetry. These results suggest that is important to maintain a constant pupillary diameter in seriate examinations.

Humanismo, sujeto, modernidad. Sobre la crítica de la razón mítica de Franz Hinkelammert

El trabajo aborda la concepción de la historia y la crítica de la modernidad desarrolladas por F. Hinkelammert, a las que se ubica en la perspectiva desarrollada por (la primera) Escuela de Frankfurt, particularmente por Walter Benjamin. En la elaboración de las categorías fundamentales de la reflexion hinkelammertiana sobre la historia, se destaca un primer hito fundamental, constituido por la Crítica de la razón utópica. En esta obra, el autor presenta la aspiración de alcanzar verdaderas metas imposibles, pensadas en términos de instituciones perfectas, a partir de acercamientos progresivos, como una tendencia propia de la racionalidad moderna que debe ser sometida a critica. La Crítica de la razón mítica constituye el segundo hito de ese desarrollo critico, en el cual se retoma la relación entre cristianismo y modernidad a partir del concepto de “secularización”, mostrando sus relaciones de continuidad/ ruptura respecto a los resortes miticos que alientan paradójicamente la razón instrumental Abstract The work approaches the conception of history and the critique of modernity developed by F. Hinkelammert’s, which lies in the perspective developed by the (first) Frankfurt School, particularly by Walter Benjamin. In the developing of the fundamental categories of the Hinkelammert reflection on history, highlights a fundamental first landmark, constituted by the Critic of the utopian reason. In this work, the author presents the aspiration to achieve real impossible goals, thought in terms of perfect institutions, from progressive approaches, as an own tendency of the modern rationality that must be subjected to criticism. The Critic of the mythical reason constitutes the second landmark of that critical development, in which retakes the relation between Christianity and modernity from the concept of “secularization”, showing its relations of continuity/rupture in respect to the mythical springs that paradoxically encourage the instrumental reason.