Topic
Accommodative convergence
About: Accommodative convergence is a research topic. Over the lifetime, 227 publications have been published within this topic receiving 3960 citations.
Papers published on a yearly basis
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Papers
TL;DR: This paper deals only with the first three components of pupillary constriction, the most important being accommodation, accommodative convergence, fusional vergence, and fixation movement (version).
Abstract: Introduction It is an imposing accomplishment of the visuomotor innervating system to continue deftly repositioning a pair of retinas so that single binocular vision is enjoyed while the eyes are scanning a distant scene. Yet, still more impressive is the ability to instantaneously shift the eyes from the distant scene to a wrist watch, identify the time, and immediately refixate the distant panorama. This feat of a swift, precise, coordinated change in the optics and alignment of the eyes which provides the finest detail of the near visual pattern to be sharply and singly seen is made possible by the near vision complex. The simultaneous application of many distinct phenomena during fixation at near makes up the near vision complex, the most important being (1) accommodation, (2) accommodative convergence, (3) fusional vergence, (4) fixation movement (version), and (5) pupillary constriction. This paper deals only with the first three components of
138 citations
TL;DR: This study establishes statistical normal values for these parameters in a paediatric population and their means are a valuable instrument for separating children with binocular anomalies from those with normal binocular vision.
119 citations
TL;DR: In this paper, the changes in lens curvatures, whether surface or internal, have been characterized as a function of accommodation and subject age by use of quantitative analysis of Scheimpflug slit-lamp photographic images.
Abstract: Accommodation in the human eye occurs through controlled changes in crystalline lens shape, thickness, and refractive surface placement relative to the cornea. The changes in lens curvatures, whether surface or internal, have been characterized as a function of accommodation and subject age by use of quantitative analysis of Scheimpflug slit-lamp photographic images. Radii of curvature of the major lens refractive surfaces--the external and nuclear boundaries--decrease linearly with increasing accommodation in all eyes that are capable of accommodation. The rates at which they change with accommodation are age dependent, decreasing steadily toward zero with increased age. For the curves visible in each lens half, arising from boundaries between adjacent zones of discontinuity, radius of curvature and location are linearly related over the entire accommodative range for a given lens and over the age range for the population. The slope of this relationship changes with both accommodation and age, decreasing linearly in both cases. The relationship between these geometric changes and the loss of accommodative amplitude is discussed.
93 citations
TL;DR: Results indicate that changing size is stimulating accommodation directly and vergence secondarily through an AC/A crosslink.
90 citations
TL;DR: Fine random dot stereoacuity is associated with a constant misalignment of less than 4 months' duration and these findings promote prompt and aggressive treatment of accommodative ET at the onset of intermittent or constant misAlignment.
Abstract: Purpose: Despite successful optical realignment, many children with accommodative esotropia (ET) have abnormal stereoacuity. In a prospective study, we examined the influence of age of onset, age at alignment, duration of constant misalignment, and accommodative convergence/accommodation ratio on random dot stereoacuity outcomes in accommodative ET. Methods: Participants were 111 consecutive children with accommodative ET. Random dot stereoacuity was measured using the Randot preschool stereoacuity test, the Randot stereoacuity test, the infant random dot stereoacuity cards, and the Lang 1. Results: Age of onset has only a minor influence on stereoacuity ( P P P P >.10). Conclusions: Fine random dot stereoacuity is associated with a constant misalignment of less than 4 months' duration. These findings promote prompt and aggressive treatment of accommodative ET at the onset of intermittent or constant misalignment. (J AAPOS 2000;4:15-20)
85 citations
Related Topics (5)
Performance Metrics
| Year | Papers |
|---|---|
| 2021 | 3 |
| 2020 | 6 |
| 2019 | 6 |
| 2018 | 6 |
| 2017 | 5 |
| 2016 | 4 |