Study Of Binocular Vision Research Articles

The Maintenance Algorithm of Patients with Myopia and the Risk of Asthenopia after Keratorefractive Surgery

Purpose. To develop a step-by-step algorithm for managing patients with myopia and the risk of developing asthenopia after keratorefractive surgery (KRS) to optimize the work of the ophthalmologist and increase patient satisfaction with the results of the operation. Materials and methods . 66 patients (132 eyes) with moderate to high myopia were examined. The special research methods needed to create an algorithm for managing patients with myopia and the risk of developing asthenopia after corneal surgery were the study of binocular vision, fusional reserves, and a cover/uncover test to identify heterophoria and heterotropy. Results. Based on the identified of PA predictors development and the developed course of functional treatment of accommodation and binocular function disorders in patients with moderate and high myopia, after CLRS, a step-by-step algorithm was developed for managing patients with myopia and the risk of developing PA. Conclusion. Optimization of the ophthalmologist’s work and an increase the patient’s satisfaction with the results of excimer laser corneal surgery.

Can appearance be so deceptive? Representationalism and binocular vision

Psychophysical experiments have demonstrated that visual information is used to construct a number of representations of the three-dimensional structure of our environment, and may be used in a variety of specific ways in order to perform perceptual tasks and to control our actions. There remain however important unanswered questions about the nature of these representations and their relationship to perceptual experience. The first question relates to the nature of the representation of depth. While there is broad agreement that multiple representations are involved, there is some disagreement about the exact nature and relationship between these representations. The second question to be asked is how these representations relate to our perceptual experience. While it has been suggested that experience is associated with activity in the ventral visual pathway, it is argued here that its characteristics are in many ways more closely aligned with those suggested for processing in the dorsal pathway. The final question addressed is whether there exist qualitative differences between monocular and binocular visual processing. It is argued that, while there appear to be no fundamental geometrical differences between monocular and binocular vision, it is possible that binocular vision may possess a quality or vividness that does not supervene on such geometrical properties. By allowing us to pose specific questions of this sort, it is proposed that the study of binocular vision can provide valuable insights regarding representationalist views of visual experience.

An introduction to the mathematics of ocular kinematics

The research surrounding ocular kinematics has widespread applications including the study of binocular vision, virtual reality and the detec-tion of ocular and neurologic pathologies. This field promises to have a significant impact on optometric diagnostic techniques. This paper in-troduces the terminology used in the description of eye rotations and explores a number of the mathematical approaches pertinent to the topic of ocular kinematics.

From Dichoptic to Dichotic: Historical Contrasts between Binocular Vision and Binaural Hearing

Phenomena involving vision with two eyes have been commented upon for several thousand years whereas those concerned with hearing with two ears have a much more recent history. Studies of binocular vision and binaural hearing are contrasted with respect to the singleness of the percept, experimental manipulations of dichoptic and dichotic stimuli, eye and ear dominance, spatial localisation, and the instruments used to stimulate the paired organs. One of the principal phenomena that led to studies of dichotic hearing was dichoptic colour mixing. There was similar disagreement regarding whether colours or sounds could be combined when presented to different paired organs. Direction and distance in visual localisation were analysed before those for auditory localisation, partly due to difficulties in controlling the stimuli. Instruments for investigating binocular vision, like the stereoscope and pseudoscope, were invented before those for binaural hearing, like the stethophone and pseudophone.

The Praying Mantids

The Praying Mantids

Jean Theophile Desaguliers (1683-1744) and eighteenth century vision research

The emergence of psychology as an empirical discipline was influenced to a great extent by experimental investigations of visual phenomena, particularly in the nineteenth century. Less attention has been paid to experimental enquiries conducted in the eighteenth century, especially those of Jean Théophile Desagliers (1683-1744). He was an ardent advocate of Newtonian optics, on which he lectured and gave demonstrations. His research on colour and binocularity is outlined, together with those of other students of vision in that century. Experiments on visual vertigo conducted at the end of the century are also described. In 1716 Desaguliers reported a method of binocular combination that became widely employed in other studies of binocular vision, namely, placing an aperture in such a position that two more distant, adjacent objects were in the optical axes of each eye. Under these circumstances red and green patches of silk did not mix after the manner of combining prismatic lights, but engaged in rivalry. Desaguliers also investigated size perception and showed that apparent size was determined by apparent distance rather than physical distance. Moreover, he did not base his conclusions on his own observation but on those of 'any unprejudic'd Person'. Thus, both stimulus control and the use of the unbiased observer were employed in eighteenth century experimental studies of vision.

A New Instrument for the Study of Binocular Vision and the Correction of its Anomalies

A New Instrument for the Study of Binocular Vision and the Correction of its Anomalies