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N. Briceño–Colmenares, D. Romero–Apis, G. Campomanes, J.A. Espinoza–Navarro, M. Acosta–Silva; Degree of Deviation in Primary Position in Patients With III and VI Nerve Lession . Invest. Ophthalmol. Vis. Sci. 2006;47(13):2468.
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To quantify the degree of deviation in primary position in patients with III and VI nerve lession.
This is a retrospective study where files from patients with a diagnosis of III or VI nerve injury at the Fundacion Hospital Nuestra Señora de La Luz, IAP were reviewed from January 2000 to January 2005. All patients had a complete ophthalmological evaluation. Quantification of the deviation was done as follows: always primary position, fixing the healthy eye, and using the simultaneous prism and cover test. Paralisis was defined as a limitation of –4 or more, paresis was defined as a limitation of – 3 or less. Limitation of adduction in III nerve and abduction in VI nerve were studied. Comparison of the degree of the deviation was made between esodeviation in VI nerve and exodeviation in III nerve and then correlated them with the duction deficiency.
71 files of patients were included. Thirty one with III nerve injury(11 had palsy and 20 paresis) and 40 with VI nerve injury (16 with palsy and 24 with paresis). Medium deviation correlated with limitation grade was: In III nerve group: limitation of –1 (31.08 PD), –2 (41.25 PD), –3 (37.5 PD), –4 (51.36 PD). In VI nerve group: limitation of –1 (20.85 PD), –2 (18.87 PD), –3 (30.5 PD), –4 (39.06 PD). Mode deviation correlated with limitation grade was: In III nerve group: limitation of –1 (30.0 PD), –2 (40.0 PD), –3 (20.0 PD), –4 (45.0 PD). In VI nerve group : –1 (20.0 PD), –2 (25.0 PD), –3 (45.0 PD), –4 (30.0 PD).
The horizontal deviation found in III nerve lession is larger than that found in VI nerve lession.
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