Risk of consecutive esotropia after surgery for intermittent exotropia according to passive duction force

Kang, Hong Tae; Shin, Hyun Jin; Lee, Andrew G.

doi:10.1371/journal.pone.0281392

Cited by 2 publications

(2 citation statements)

References 25 publications

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“…The authors previously designed a simple and compact device that integrated forceps, load cells, and tilting sensors [11]. It provided quantitative and continuous measurements of passive EOM tension and could be applied to the treatment of patients with intermittent exotropia [17][18][19].…”

Section: Introductionmentioning

confidence: 99%

Novel Instrument for Clinical Evaluations of Active Extraocular Muscle Tension

Shin,

Kim,

Kang

et al. 2023

Applied Sciences

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Strabismus can be caused by abnormal tension of the extraocular muscles (EOMs) attached to the eyeball in superior, inferior, lateral, medial, superior oblique, and inferior oblique positions. Evaluating the tension in each EOM is crucial for surgical planning in strabismus, which is conducted by adjusting the tension on the EOM. The purpose of this study was to develop a compact measuring device to non-invasively evaluate the active EOM tension. The proposed device employed a cotton-tipped medical swab to transfer the EOM tension connected to the force sensor as a non-invasive medium. The tilting angle of the swab and the force of active EOM tension were wirelessly transferred to a laptop computer for recording and real-time displaying of the measured values. The active EOM tensions for the four recti muscles were 101.7 ± 15.0 g (mean ± SD) for the lateral rectus; 88.0 ± 15.4 g for the medial rectus; 61.3 ± 6.8 g for the inferior rectus; and 121.3 ± 38.5 g for the superior rectus. These values were higher than the reported values of 45–60 g measured in previous studies. In the previous studies, however, the EOM was detached from the globe and attached to a strain gauge, and, thus, there were no passive elastic forces from ocular connective tissue, resulting in lower values compared with the current study. The previous methods were also complex and not suitable for clinical measurement. Thus, the proposed method, which is non-invasive and mimics the conventional force generation test with a cotton-tipped swab, could facilitate the evaluation of active EOM tension, both clinically in strabismus management and in research into understanding its pathophysiology.

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Section: Introductionmentioning

confidence: 99%

Novel Instrument for Clinical Evaluations of Active Extraocular Muscle Tension

Shin,

Kim,

Kang

et al. 2023

Applied Sciences

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“…Consecutive exotropia is a manifest exotropia that appears in a patient who was previously esotropic following esotropia surgery 1 . According to several research, the incidence of consecutive exotropia ranges from 3% to 29% [2][3][4] .…”

Section: Introductionmentioning

confidence: 99%

Medial Rectus Advancement Compared to Lateral Rectus Recession for Small To Moderate Angle Consecutive Exotropia

Esmail,

Abd El meged Nage,

Ibrahim

2023

Egyptian Journal of Ophthalmology, (Mansoura Ophthalmic Center)

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Background: Consecutive exotropia is an exodeviation type that appears after surgically correcting esodeviation and is distinguished by postoperative exotropia lasting longer than a month.Aims: to assess the bilateral medial rectus advancement (MRA) compared to bilateral lateral rectus recession (LRR) among patients with consecutive exotropia.Methods At Menoufia University Hospital, a prospective clinical trial included 24 patients was conducted in the period from May 2022 to June 2023. The patients were divided into 2 groups, each group contained 12 patients who underwent bilateral medial rectus advancement and bilateral lateral rectus recession. Demographic data, as well as preoperative and postoperative ocular alignment were determined for each patient. All patients were followed up by one weeks, 2, 4, 8, and 12 months postoperative.Results: Half of group MRA group's patients (50%) were males vs five (41.66%) of the LRR group's patients, with no obvious differences between the two groups (P=0.682). There were no appreciable changes between the MRA and LRR groups (P>0.05) in preoperative and postoperative ocular alignment. Conclusions:The two surgery groups in this study did not significantly differ from one another. Both of these surgical techniques can be used to effectively treat consecutive exotropia, but LR recession is a reasonably straightforward to perform.Recession of the LR should be performed on patients with chronic exotropia and no vertical abnormalities.

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Risk of consecutive esotropia after surgery for intermittent exotropia according to passive duction force

Cited by 2 publications

References 25 publications

Novel Instrument for Clinical Evaluations of Active Extraocular Muscle Tension

Novel Instrument for Clinical Evaluations of Active Extraocular Muscle Tension

Medial Rectus Advancement Compared to Lateral Rectus Recession for Small To Moderate Angle Consecutive Exotropia

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