Excursion Tests of Ocular Motility

Boylan, Christine; Clement, Richard A.

doi:10.1111/j.1475-1313.1987.tb00988.x

Cited by 7 publications

(3 citation statements)

References 9 publications

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“…1982). In other studies by Clement and Howrie (1985) and by Boylan and Clement (1987). V-and A-motility patterns and seceral tests of ocular motilitq ueie anal>zed Kault et a1 (i987) studied the influence of the Size ot the eqe.…”

Section: Introductionmentioning

confidence: 98%

Robinson's Computerized Strabismus Model Comes of Age

Simonsz

Spekreijse

1996

Strabismus

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In this article we review our further development of D.A. Robinson's computerized strabismus model. First, an extensive literature study has been carried out to get more accurate data on the anatomy of the average eye and the eye muscles, and about how these vary with age and with refraction. Secondly, the force-length relations that represent the mechanical characteristics of the eye muscles in the model have been determined more accurately in vivo recently, and the model was changed accordingly. Thirdly, many parameters that were free in the original model and not derived from in vivo measurements were replaced by derivatives from in vivo measurements or made redundant. Fourthly, the ease of operation was improved greatly and the algorithms were made so much faster that a calculation for nine positions of gaze now takes ten seconds on a handheld HP 200LX Palmtop. The predictions of the model compared well with clinical results in horizontal muscle surgery, oblique muscle surgery, forced duction tests and abducens, oculomotor or trochlear palsies. Consequently, complex strabismus surgery in our clinic is now guided by the predictions of the computerized model.

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Section: Introductionmentioning

confidence: 98%

Robinson's Computerized Strabismus Model Comes of Age

Simonsz

Spekreijse

1996

Strabismus

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“…This change was made Computed extraocular muscle activity during blinks: C . Boylan and R. A. Clement because the paths of the muscles are incorrect in the primary position in that the superior rectus passes underneath the superior oblique and the inferior rectus does not touch the inferior oblique (Boylan and Clement, 1987). Although this error does not significantly alter the calculated length changes of the muscles, it does lead to errors in the calculation of their secondary actions.…”

Section: Methodsmentioning

confidence: 99%

Computed extraocular muscle activity during blinks

Boylan

Clement

1989

Ophthalmic Physiologic Optic

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“…In a previous study, Boylan and Clement (1987) used a description of the mechanical actions of the extraocular muscles to compare the effectiveness of excursion tests of oculomotility, and it was shown that the most effective test of the vertically acting muscles involves examining the eye during a transverse movement when they are elevated and when they are depressed. We have calculated the appearance of the eyes when each of the vertically acting muscles of the left eye have a 75% paresis and the right eye is fixating the outer points on the Hess screen, with -30,O and +30 degrees of horizontal movement.…”

Section: Interpretation Of Oculomotility Testsmentioning

confidence: 99%