Surgical treatment for small-angle vertical strabismus

Sanz, P. Merino; Osuna, Verónica; Sánchez, Pilar Gómez de Liaño; Torres, H.E. Donoso

doi:10.1080/09273972.2020.1832543

Cited by 4 publications

(6 citation statements)

References 16 publications

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“…Sanz et al 15 have also described partial recession of the inferior and superior rectus muscles with a mean preoperative vertical deviation of 6.11PD in primary position which corrected to a postoperative vertical deviation of 2.05PD. They performed an average recession of 4.14 ± 0.42 mm.…”

Section: Discussionmentioning

confidence: 97%

“…To decrease the risk of overcorrections in many strabismus disorders with small deviations, partial surgeries have been considered, including graded partial tenotomy, mini-tenotomy, mini-plication, and graded marginal recession. 13–16 This study reports on four patients with moderate-angle vertical deviations secondary to unilateral superior oblique palsy and evaluated the effectiveness of inferior oblique recession with contralateral partial temporal inferior rectus recession in this series.…”

Section: Introductionmentioning

confidence: 99%

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Inferior oblique recession associated to partial temporal inferior rectus recession in unilateral congenital superior oblique palsy

Burgos-Blasco

Hernández-García

Orden

et al. 2021

European Journal of Ophthalmology

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Purpose: To evaluate the effectiveness of inferior oblique recession with contralateral partial temporal inferior rectus recession in patients with decompensated congenital unilateral superior oblique palsy (SOP) in correcting moderate vertical deviations in primary position. Methods: The medical records of patients with SOP who underwent inferior oblique recession with contralateral partial temporal inferior rectus recession were reviewed retrospectively. Vertical deviation in primary position, subjective torsion, diplopia, residual deviation, and the deviation decrease were evaluated. Results: Four patients (three males and one female, age range 29–56 years) with congenital unilateral SOP and mean vertical deviation of 21.0 ± 5.3PD (range 14–25D) in primary position were included. Mean correction of hypertropia in primary position with this technique was 15.5 ± 5.3PD (range 10–20PD). The mean hypertropia on gaze to the contralateral side changed from 30.0 ± 10.8D before surgery to 9.3 ± 7.9D after surgery. Torsion had a mean change of 4.8° of incyclodeviation. Preoperatively, all patients had head tilt and diplopia, which was resolved in all but one patient, who will need surgery. Patients were followed an average of 18 months. No adverse events were reported in any subjects. Conclusion: When performing recession of inferior oblique muscles in SOP associated to a full recession of the contralateral inferior rectus, there is a risk of overcorrection in those with moderate angles. Performing a partial recession in the contralateral inferior rectus eye corrected up to 20PD in primary position in our series, reducing this risk.

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Section: Discussionmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

Inferior oblique recession associated to partial temporal inferior rectus recession in unilateral congenital superior oblique palsy

Burgos-Blasco

Hernández-García

Orden

et al. 2021

European Journal of Ophthalmology

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“…Given that it is necessary to determine the micromovement of the eye, the proficiency of the examiner is required. If there is a suppression area or microscopic scotoma in the eye, monocular vision and stereoacuity tend to decrease, and monofixation syndrome [25,26] symptoms may appear due to small-angle strabismus [27,28]. Monocular fixation reduces stereopsis.…”

Section: Discussionmentioning

confidence: 99%

Implementation of Kiosk-Type System Based on Gaze Tracking for Objective Visual Function Examination

Kim

Lee

et al. 2022

Symmetry

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To demonstrate that the near-point-of-convergence (npc) examination is performed subjectively, the visual fixation and four-prism diopter (Δ) base-out (BO) examinations can be conducted with a kiosk-type objective examination method based on gaze tracking, and can be compared with the existing method. Objective examination equipment was used to verify effectiveness. Fifteen adult men and women in their 20s and 30s (26.87 ± 3.31 years) with visual acuity of 0.8 (logMAR: 0.1, Snellen: 20/25(6/7.5)) or higher (corrected vision in the case of ametropia) underwent the npc, visual fixation, and 4 Δ BO examinations based on the existing examination method followed by the gaze-tracking-based kiosk-type examination method. Three examinations were performed, and a comparative analysis was conducted. The gaze tracking method used a method of extracting eye feature points, and it was judged that the ocular moved when the movement of 30 eye feature points at the edge of the iris was detected. In the comparison between the existing method and the kiosk-type method, there were no statistically significant differences in npc, visual fixation, and 4 Δ BO examinations. Npc examinations were performed extensively by the existing subjective method, however, it seems that these can be conducted objectively using the kiosk-type method. Visual fixation and 4 Δ BO examinations require high-examination proficiency because finely moving ocular movements need to be observed, but it is judged that examinations can be performed more easily and accurately when combined with the kiosk-type method. The symmetrical characteristics between the two test results are expected to serve as a basis for using the kiosk-type examination method in clinical practice.

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“…The clinical injection of botulinum toxin type A (BTX-A) into the motor end plate of antagonistic or agonist muscles to block the release of acetylcholine or to facilitate extraocular muscle transplantation can be used to correct strabismus caused by extraocular muscle paralysis and spasticity (Sanz et al 2020). The efficacy of BTX-A depends on the proximity of the injection site to the motor endplate band (i.e., the target).…”

Section: Introductionmentioning

confidence: 99%

Overall Distribution Pattern of the Intramuscular Nerves of the Extraocular Muscles and its Clinical Implications

Zhou

Wang

et al. 2021

Int. J. Morphol.

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Surgical treatment for small-angle vertical strabismus

Cited by 4 publications

References 16 publications

Inferior oblique recession associated to partial temporal inferior rectus recession in unilateral congenital superior oblique palsy

Inferior oblique recession associated to partial temporal inferior rectus recession in unilateral congenital superior oblique palsy

Implementation of Kiosk-Type System Based on Gaze Tracking for Objective Visual Function Examination

Overall Distribution Pattern of the Intramuscular Nerves of the Extraocular Muscles and its Clinical Implications

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