Decreased Accommodative Response in the Nondominant Eye of Patients With Intermittent Exotropia

Yang, Hee Kyung; Hwang, Jeong‐Min

doi:10.1016/j.ajo.2010.06.047

Cited by 22 publications

(13 citation statements)

References 19 publications

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“…Studies measuring ocular changes of both eyes simultaneously during near tasks with binocular viewing may provide insight into characteristics that influence ocular dominance. Yang and Hwang compared the interocular equality of the accommodative response in children with intermittent exotropia, without amblyopia or anisometropia. During monocular viewing, the dominant and non‐dominant eyes of intermittent exotropes both showed a small lag of accommodation; however, during binocular fixation, a significant number of subjects displayed a greater lag of accommodation in the non‐dominant eye compared to the fellow dominant eye.…”

Section: Ocular Dominancementioning

confidence: 99%

Myopic anisometropia: ocular characteristics and aetiological considerations

Vincent

Collins

Read

et al. 2014

Clinical and Experimental Optometry

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Anisometropia represents a unique example of ocular development, where the two eyes of an individual, with an identical genetic background and seemingly subject to identical environmental influences, can grow asymmetrically to produce significantly different refractive errors. This review provides an overview of the research examining myopic anisometropia, the ocular characteristics underlying the condition and the potential aetiological factors involved. Various mechanical factors are discussed, including corneal structure, intraocular pressure and forces generated during near work that may contribute to development of anisomyopia. Potential visually guided mechanisms of unequal ocular growth are also explored, including the influence of astigmatism, accommodation, higher-order aberrations and the choroidal response to altered visual experience. The association between binocular vision, ocular dominance and asymmetric refraction is also considered, along with a review of the genetic contribution to the aetiology of myopic anisometropia. Despite a significant amount of research into the biomechanical, structural and optical characteristics of anisometropic eyes, there is still no unifying theory, which adequately explains how two eyes within the same visual system grow to different endpoints.

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Section: Ocular Dominancementioning

confidence: 99%

Myopic anisometropia: ocular characteristics and aetiological considerations

Vincent

Collins

Read

et al. 2014

Clinical and Experimental Optometry

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“…Our findings are consistent with this previous work in that the dominant eye always displayed a greater (more accurate) accommodative response compared to the non‐dominant eye, however, we also observed this for imposed hyperopic defocus, and irrespective of which eye the defocus was imposed upon. Our results also agree with Yang and Hwang who compared the interocular equality of accommodation in children with intermittent exotropia, without amblyopia or anisometropia. They observed that under monocular viewing conditions, the dominant and non‐dominant eyes of intermittent exotropes both showed a small lag of accommodation of similar magnitude; however, during binocular fixation, most children displayed a greater lag of accommodation in the non‐dominant eye compared to the fellow dominant eye.…”

Section: Discussionmentioning

confidence: 99%

The short‐term accommodation response to aniso‐accommodative stimuli in isometropia

Vincent

Collins

Read

et al. 2015

Ophthalmic Physiologic Optic

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“…It is possible that some subjects did not make a full effort to focus each eye on the fixation target. However, Yang and Hwang 27 have shown that subjects with intermittent exotropia display only a 0.20 diopter asymmetry in accommodative response between the dominant and nondominant eye during monocular fixation of near targets. This modest difference, and the lack of any relationship between eye dominance and incomitance ( Fig.…”

Section: Discussionmentioning

confidence: 99%

Incomitance and Eye Dominance in Intermittent Exotropia

Adams

Economides

Horton

2017

Invest. Ophthalmol. Vis. Sci.

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PurposeTo determine if the deviation angle changes in subjects with intermittent exotropia as they alternate fixation between the right and left eye in primary gaze.MethodsIn this prospective observational cohort study, 37 subjects with intermittent exotropia were tested for evidence of incomitance. The position of each eye was recorded with a video tracker during fixation on a small central target. A cover–uncover test was performed by occluding one eye with a shutter that passed infrared light, allowing continuous tracking of both eyes. The deviation angle was measured during periods of right eye and left eye fixation. Incomitance was assessed as a function of eye preference, fixation stability, and exotropia variability.ResultsThe mean exotropia was 18.2° ± 8.1°. A difference between right exotropia and left exotropia was detectable in 16/37 subjects. Allowing for potential tracking error, the incomitance had a mean amplitude of 1.7°. It was not related to a difference in accommodative effort, eye preference, fixation stability, or variability in deviation.ConclusionsComitance is regarded as a feature that distinguishes strabismus from paralytic or restrictive processes. Unexpectedly, eye tracking during the cover–uncover test showed that incomitance is present in approximately 40% of subjects with intermittent exotropia. It averages 10% of the exotropia, and can equal up to 5°. When substantial, it may be worth considering when planning surgical correction.

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Decreased Accommodative Response in the Nondominant Eye of Patients With Intermittent Exotropia

Cited by 22 publications

References 19 publications

Myopic anisometropia: ocular characteristics and aetiological considerations

Myopic anisometropia: ocular characteristics and aetiological considerations

The short‐term accommodation response to aniso‐accommodative stimuli in isometropia

Incomitance and Eye Dominance in Intermittent Exotropia

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