Asunto(s)
Lentes de Contacto , Errores de Refracción/rehabilitación , Catarata/rehabilitación , Lentes de Contacto/efectos adversos , Lentes de Contacto/instrumentación , Humanos , Hipersensibilidad/etiología , Queratitis/etiología , Queratocono/rehabilitación , Métodos , Aceptación de la Atención de Salud , Presbiopía/rehabilitaciónRESUMEN
The aviator or astronaut is subject to alterations of the environment which may seriously affect his performance or survivability. In a series of experiments, the stresses of hypoxia, vibration, high and low gravity, heat and noise were investigated to determine their effects upon visual function. With the possible exceptions of the latter two, all were found to produce measurable decrements in performance even at moderate levels; however, it is most remarkable that significant capability remains even in rather severe stress. Certain hypotheses regarding these visual decrements that have appeared in the literature are rejected on the basis of experimental evidence.
Asunto(s)
Medicina Aeroespacial , Vuelo Espacial , Estrés Fisiológico , Trastornos de la Visión/etiología , Visión Ocular , Aceleración/efectos adversos , Adulto , Animales , Lentes de Contacto/instrumentación , Movimientos Oculares , Haplorrinos , Humanos , Hipoxia/complicaciones , Macaca mulatta , Masculino , Estrés Fisiológico/complicaciones , Anomalía Torsional , Estados Unidos , Vibración/efectos adversos , Agudeza VisualRESUMEN
This paper is a clinical discussion of the effects of corneal lens fenestration on visible corneal edema and spectacle blur. Most of the discussion centers about photo slit lamp material selected to illustrate some of the author's experience with the subject. Although everyone does not benefit from fenestration, photographs show several cases in which visible corneal edema is reduced. Among patient impressions, the outstanding benefit is reduction of spectacle blur.