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PURPOSE Application of adequate correction of refractory errors for the treatment of asthenopia of young visual display terminal (VDT) workers was evaluated from subjective complaints and the effect on accommodation dynamics (step response) before and after 6 months. METHODS Young VDT workers who visited the clinic because of eye strain were consecutively(More)
PURPOSE To compare motor and sensory capabilities for fusion of vertical disparities at different angles of horizontal vergence in healthy humans. METHODS Eye movements were recorded from both eyes of 12 healthy subjects using three-axis search coils. The stimulus was a cross (+) (3.4 x 3.2 degrees , vertically and horizontally, respectively) presented to(More)
Two clinical cases in which ischemic optic neuropathy (ION) occurred after subarachnoid hemorrhage (SAH) are reported. Hemorrhage in the proximity of the optic chiasm was confirmed in 2 cases following rupture of an anterior communicating artery aneurysm. Optic disk atrophy with excavation and permanent visual field defect (altitudinal superior hemianopia)(More)
From 1986 to 1990, 77 cases of ruptured anterior communicating artery (Aco) aneurysms have been operated on through an interhemispheric approach or a pterional approach. In this study, we mainly investigated the following factors: surgical outcome, surgical complications, degree of evacuation of subarachnoid clot, and frequency of symptomatic vasospasm. The(More)
We investigated the effects of viewing video movies with a head-mounted display (HMD) for 4 to 6 hours on visual functions such as refraction, visual acuity, and accommodation-vergence system. Two or three video movies were watched without any breaks by 13 normal volunteers (age: 22 approximately 40). Measurements were made of (1) objective and subjective(More)
PURPOSE Myopia in school-age children has become increasingly prevalent in industrialized countries, especially in Asia. A large population of school-age children still suffers from low visual acuity. We have developed a novel, safe and noninvasive training method to activate a pupillary constriction response during far accommodation that results in(More)
We evaluated the effects of electrolytic lesions in the extrastriate cortical area on the amplitudes and velocities of vergence eye movements in six alert cats that were trained to track a target moving in depth. Bilateral or unilateral lesions in the lateral suprasylvian (LS) cortex reduced the amplitudes and velocities of vergence eye movements, but the(More)
Fragestellung: Untersucht wurde der Einfluß unterschiedlicher konvergenter Augenstellungen auf die vertikale Fusionsbreite. Methodik: 12 Normalpersonen wurde haploskopisch mit einer LCD-Brille ein Kreuz angeboten, das unter einem Gesichtswinkel von 3,4°×3,2° gesehen wurde. Vertikale Disparität wurde durch Verschiebung eines der beiden Kreuze um 0.08° alle(More)
Ocular convergence and lens accomodation were evoked by microstimulation in the lateral suprasylvian area (LS cortex) in the parieto-occipital cortex in the cat. Electrolytic lesions in LS cortex reduced the amplitude and velocity of ocular convergence. Neurons in LS cortex discharged in relation to ocular convergence and/or lens accommodation. These(More)