Nearwork-induced transient myopia

@article{Ong2005NearworkinducedTM,
  title={Nearwork-induced transient myopia},
  author={Editha Ong and Kenneth J. Ciuffreda},
  journal={Documenta Ophthalmologica},
  year={2005},
  volume={91},
  pages={57-85}
}
  • E. Ong, K. Ciuffreda
  • Published 1 February 1995
  • Psychology, Medicine
  • Documenta Ophthalmologica
The literature on nearwork-induced transient myopia (NITM) is reviewed, with NITM being defined as the short-term myopic far point shift immediately following a sustained near visual task. A majority of these investigations demonstrated the presence of NITM for a variety of test parameters, e.g., visual acuity, contrast sensitivity and far point. Overall, these studies reported relatively small myopic shifts, with a mean of approximately 0.40 D and a range from 0.12 to 1.30 D. The subsequent… 
Refractive error, cognitive demand and nearwork-induced transient myopia
TLDR
The data show that for EOMs the level of cognitive activity operating during the near and far tasks determines the persistence of NITM; persistence being maximal when active cognition at near is followed by passive cognition at far.
Ocular changes associated with accommodation in myopes and emmetropes
TLDR
Changes in the shape and thickness of a number of the eye's structures during near work, and aspects of these changes showed differences associated with myopia have potentially important implications for understanding of the role of near work in the development and progression of myopia.
Nearwork-induced transient myopia in myopic and non-myopic Indian subjects
This research project investigated the characteristics of near-work induced transient myopia (NITM) in asymptomatic myopes and non-myopes among Indian subjects and its variation with target size and
Reproducibility of nearwork-induced transient myopia measurements using the WAM-5500 autorefractor in its dynamic mode
TLDR
The initial NITM was highly repeatable, with the later decay phase being more variable, yet still yielding acceptable reproducibility in many cases, and both of these key parameters can be assessed reliably and with good reproducecibility.
Nearwork‐induced transient myopia (NITM) following marked and sustained, but interrupted, accommodation at near
TLDR
The initial magnitude and decay of nearwork‐induced transient myopia (NITM) and its potential additivity, following successive but interrupted periods of marked, sustained accommodation at near in asymptomatic young‐adult myopic subjects are determined.
Transient Drug-Induced Myopia
TLDR
Transient drug-induced myopia is a myopia induced by a drug as a transient side effect that is associated with secondary angle closure glaucoma and other ocular conditions such as choroidal detachment, maculopathy, retinal folds.
Additivity of near work-induced transient myopia and its decay characteristics in different refractive groups.
TLDR
It is speculated that with repeated cycles of near work, residual NITM may contribute to the progression of permanent myopia and may be attributed to impaired sympathetic function in the subjects with myopia.
Effect of laptop computer games on vision
TLDR
Findings suggest prolonged laptop usage in a real-world environment causes transient blur and brief NITM, and this study looked at the effects on refractive condition and visual acuity after playing a computer game on a laptop computer for 90 minutes.
Effect of nearwork-induced transient myopia on distance retinal defocus patterns.
TLDR
In the normal isolated distance viewing situation with only very small myopic defocus present, the paucity of overall retinal defocus may provide a "protected" condition against myopia development, but with the addition of NITM producing increased myopic retinaldefocus only, there is an imbalance of retinalDefocus that may be myopigenic, especially in the context of foveal and peripheral retinal interactions.
Prolonged nearwork affects the ciliary muscle morphology.
TLDR
Previous studies suggesting sustained nearwork to result in a CM spasm cannot be confirmed by the data presented here, and further research exploring the possible impact of sympathetic innervation is necessary as it is activated during intense nearwork.
...
1
2
3
4
5
...

References

SHOWING 1-10 OF 69 REFERENCES
Cognitive Demand and Transient Nearwork-lnduced Myopia
  • M. Rosenfield, K. Ciuffreda
  • Psychology, Medicine
    Optometry and vision science : official publication of the American Academy of Optometry
  • 1994
TLDR
It is concluded that the transient, task-induced myopic shift in the FPA is related to the within-task accommodative response rather than to variations in cognitive demand during the course of the near-visual activity.
“Starkfest” Vision and Clinic Science Special Issue: Abnormal Transient Myopia in Symptomatic Individuals after Sustained Nearwork
  • K. Ciuffreda, X. Ordonez
  • Psychology, Medicine
    Optometry and vision science : official publication of the American Academy of Optometry
  • 1995
TLDR
Results showed a large post-task myopic shift, slowed baseline decay, and increased response variability as compared with that found in asymptomatic visually normal individuals, which suggested that this transient distance blur was related to the increased transient myopia resulting from one or more possible abnormalitiesrelated to the accommodative system.
Transient myopia after visual work.
TLDR
Measurement of transient myopia by means of contrast sensitivity has the advantage of being rapid enough that even short-term effects can be followed, and can be shown to be a purely optical effect of the eye.
“Starkfest” Vision and Clinic Science Special Issue: Effect of Target Proximity on Transient Myopia Induced by Equidioptric Stimuli
TLDR
The effect of target distance on transient myopia for equidioptric stimuli (5 D) and equivalent responses to the relatively small output of proximally induced accommodation believed to be present under closed-loop conditions are examined.
NEAR VISION STRESS: VERGENCE ADAPTATION AND ACCOMMODATIVE FATIGUE *
  • D. Ehrlich
  • Psychology, Medicine
    Ophthalmic & physiological optics : the journal of the British College of Ophthalmic Opticians
  • 1987
TLDR
Changes in the visual system following prolonged near work were investigated and transient myopia was found to be due to a transient regression of the far point towards the subject's tonic accommodation level.
Contribution of accommodation and disparity‐vergence to transient nearwork‐induced myopic shifts
TLDR
Findings suggest that the transient post‐task myopic shift was not related to the output of disparity‐vergence, and should not be considered a cause of concern for future studies of myopic development.
Temporal Aspects of Accommodative Adaptation
  • M. Rosenfield, B. Gilmartin
  • Psychology, Medicine
    Optometry and vision science : official publication of the American Academy of Optometry
  • 1989
TLDR
Pre- and Post-take measures of dark focus (DF) were used to assess accommodative adaptation induced by brief near-vision tasks in 10 late-onset myopes (LOW's) and 10 emmetropes and instillation of a β adrenergic antagonist attenuated this negive shift, suggesting that it was mediated viaβ adrenergic innervation to the ciliary muscle.
New evidence for the intermediate position of relaxed accommodation
Experimental evidence is presented that the focus of the eye tends to return passively to an individually characteristic intermediate resting position or dark-focus whenever (1) the stimulus to
Contrast sensitivity and the near point of accommodation after work with a visual display unit.
  • S. Gur, S. Ron
  • Medicine
    Israel journal of medical sciences
  • 1992
TLDR
It is concluded that the myopic changes in the refractive status of operators after VDU work are not evident in a decrease in contrast sensitivity, and the dynamic range of accommodation was smaller, suggesting that the visual fatigue and visual stress that developed at work hindered visual activities after work.
Tonic Accommodation, Accommodative Hysteresis, and Refractive Error
TLDR
There is no clear association between susceptibility to accommodative hysteresis and refractive category, but a tendency to greater increases in tonic accommodation was noted for the high myopes.
...
1
2
3
4
5
...