China
Africa
Explore chapters and articles related to this topic
Inferior oblique muscle function : correlation between scleral insertions of inferior, lateral recti and inferior oblique muscles and clinical function of inferior oblique muscle.
Published in Jan-Tjeerd de Faber, 28th European Strabismological Association Meeting, 2020
D. Denis, E. Hadjadj, J. Conrath, C. Benso
Primary hyperfunction of the inferior oblique muscle causes elevation of the non-fixing eye in adduction. The goal of this work was to measure the position of the scleral insertion of the inferior oblique muscle compared with those of the lateral and inferior recti muscles and to assess if these measures were correlated to clinical hyperfunction.
Effects of Alternating Fixation on the Binocular Alignment of Listing’s Plane
Published in Michael Fetter, Thomas Haslwanter, Hubert Misslisch, Douglas Tweed, Three-Dimensional Kinematics of Eye, Head and Limb Movements, 2020
J.A.M. Van Gisbergen, B.J.M. Melis, J.R.M. Cruysberg
Eye movements were recorded binocularly with the dual search coil method while the head was fixed in an upright position. In addition to a 24 year old strabismus patient (SP), we also studied four normal control subjects. The oculomotor data were collected to test the validity of Listing’s plane in far vision, to assess the alignment of the two planes and to determine the effect of alternating fixation. The patient has normal visual acuity in his dominant right eye and near normal acuity in his left eye which has an uncorrected hypermetropia of +1.75 diopters in distant vision. He was operated twice, before the age of six, to correct esotropia of the left eye. The first operation involved anterior transposition of the inferior oblique muscle in the right eye and recession of the medial rectus muscles in both eyes. In a subsequent operation, a residual misalignment was further reduced by a recession of the inferior rectus muscle of the left eye. Having a suppression zone exceeding 35 deg, the patient lacks stereoscopic vision. Data about his ocular misalignment, which depends on which eye is fixating, will be provided below.
The Frankfurt technique of macular translocation
Published in A Peyman MD Gholam, A Meffert MD Stephen, D Conway MD FACS Mandi, Chiasson Trisha, Vitreoretinal Surgical Techniques, 2019
Claus Eckardt, Tillmann Eckert, Ute Eckardt
After the circular opening of the conjunctiva and exposure of the superior rectus and superior oblique muscles, an 8–10 mm tuck is made by folding over a spatula. A nasal muscle strip of the superior rectus is prepared and brought under the superior rectus and attached to the superior insertion of the lateral rectus muscle with a double 6-0 Vicryl suture. The lateral rectus muscle is exposed; the 8–10 mm inferior oblique muscle is recessed according to the Fink method. The inferior oblique muscle is exposed. A temporal muscle strip is prepared; it is crossed under the residual rectus and reattached to the inferior insertion of the medial rectus muscle with a double-armed 6-0 Vicryl suture.
Correction of horizontal and torsional compensatory head posture in infantile nystagmus syndrome using horizontal rectus muscle recession and resection with vertical transposition
Published in Strabismus, 2022
Vibha Baldev, Shailja Tibrewal, Soveeta Rath, Suma Ganesh
In patients with head tilt, excyclotorsion and incyclotorsion must be induced to correct the CHP. To achieve this, surgery can be done on the oblique, the vertical rectus or the horizontal muscles. Surgery on oblique muscles involve weakening of anterior fibers of superior oblique muscle (50% anterior tenectomy) to create extorsion in one eye and simultaneous weakening (recession) of inferior oblique muscle and/or strengthening of the anterior fibers of superior oblique muscle (Harada Ito procedure) in the contralateral eye to create intorsion. Lueder and Galli15 described optimal correction (mean 28º) of head tilt in six patients, and Pehere and Sutraye1 reported excellent correction (25º) in one patient with the above technique. Prakash et al.16 documented success in correcting head tilt with all four oblique muscles recession/advancement in one patient.
The Role of Hypertropia in the Surgical Management of Bilateral Inferior Oblique Muscle Overaction
Published in Journal of Binocular Vision and Ocular Motility, 2022
Matteo Scaramuzzi, Massimiliano Serafino, Aldo Vagge, Alessia Nuzzi, Giuseppe Rao, Paolo Nucci
The surgical treatment of both primary and secondary inferior oblique muscle overaction involves weakening of the inferior oblique muscle (IO).6 This procedure aims to correct functional impairment minimizing double vision symptoms as well as enhancing the cosmetic appearance. There are many useful surgical methods for the management of this condition: myectomy, myotomy, recession, and anterior transposition (IOAT) are the most commonly performed. However, no one procedure has been proven to be more effective than another, as the cohorts included for analysis by the different authors cannot be directly compared.7 Moreover, authors based their decision on which surgical plan to adopt considering only the degree of overaction of the IO muscle and none of them considered the presence of a hypertropia in the primary position.
Intramuscular Nerve Distribution of the Inferior Oblique Muscle
Published in Current Eye Research, 2020
Hyun Jin Shin, Shin-Hyo Lee, Tae-Jun Ha, Wu-Chul Song, Ki-Seok Koh
The inferior oblique muscle (IO) is responsible for extorsion, elevation, and abduction of the eye.1 Although the gross morphology of the IO has been studied extensively, the intramuscular nerve distribution has not been reported previously. The importance of identifying the nerve distribution within the extraocular muscles (EOMs) has increased over the last decade with the emergence of evidence supporting the presence of a segregated motor nerve that selectively innervates distinct muscle regions.2–4 Elucidating the detailed morphology of the nerve distribution within the IO is therefore crucial for understanding its diverse pathophysiology and function.5