ArticlePloS one2019
Deficient vergence prism adaptation in subjects with decompensated heterophoria.
Article in PloS one, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 4 papers.
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Who cites it
4 citing papers in PubMed, 9 citations in OpenAlex.
- Convergence Insufficiency Neuro-Mechanism Adult Population Study: Phoria Adaptation Results.Investigative ophthalmology & visual science · 2021Trial
- Test-retest of a phoria adaptation stimulus-induced functional MRI experiment.Journal of vision · 2020Article
- Prevalence of heterophoria in a population of school children in central China: the Anyang Childhood Eye Study.International journal of ophthalmology · 2020Article
- Effects of aligning prisms on the objective and subjective fixation disparity in far distance.Journal of eye movement research · 2019Article
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Authors and funding
3 authors at 1 institution in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Vergence prism adaptability was evaluated in subjects with high symptomatic and asymptomatic heterophoria and compared to individuals with a heterophoria within normal range (the control group). A computer haploscope was used to measure phoria values and changes in the eye position after introducing 6 prism diopters base out in front of the right eye. Phoria values were measured with a nonius paradigm every minute for a period of 10 minutes during adaptation. The results showed that subjects with symptomatic heterophoria are characterized by a lower rate of prism adaptation and adapted to a smaller extent with respect to the control group. The group with high but asymptomatic heterophoria showed prolonged adaptation time but after several minutes of binocular viewing the subjects were able to adapt to the prism to a level similar to the control group. These findings suggest that an impairment in the slow vergence control system may be responsible for the inability to fully reduce vergence effort, which results in poor vergence ranges and asthenopic symptoms during prolonged viewing.
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Registered trials
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