Ocular Saccades in Lateral Rectus Palsy

Vertical Rectus Muscle Transposition and Botulinum Toxin (Oculinum) to Medial Rectus for Abducens Palsy

“…Binocular Goldmann visual field perimetery was used to assess each patient's Accepted for publication January 10,1989. From the Departments of Ophthalmology, University of California, Los Angeles (Drs Rosenbaum preoperative and postoperative fusion di¬ plopia-free field.…”

Defect Band Characteristics in Mg-Al and Al-Si High-Pressure Die Castings

“…The first is the size and shape of HPDC grains: the small (5 to 20 lm) globular-rosette, in-cavity, solidified grains of HPDC result in a microstructure containing a large number of equiaxed grains, and the low degree of branching permits grain rearrangement to occur more readily than in microstructures consisting of more dendritic grains. [36] As a result of this microstructure, the shear stress required to initiate significant deformations during solidification is lower in HPDC than in most casting processes. Additionally, the shear during injection and the high pressure applied to the biscuit once the die cavity is full induce shear stresses sufficient to cause significant deformations during HPDC.…”

“…Experiments using either a direct shear cell [36][37][38][39] or vane rheometry [35] have shown that shear deformation at 20 to 60 pct solid is often localized in narrow regions rather than occurring homogeneously. After complete solidification, regions of strain localization are enriched in eutectic in AlSi7Mg [36][37][38][39] and do not contain porosity; [35] in AZ91, however, concentrated porosity forms in the localized band. [35] Furthermore, cracking has been reported at the shear plane during direct shear cell experiments, [36][37][38][39] similar to the torn bands sometimes observed in HPDC.…”

“…After complete solidification, regions of strain localization are enriched in eutectic in AlSi7Mg [36][37][38][39] and do not contain porosity; [35] in AZ91, however, concentrated porosity forms in the localized band. [35] Furthermore, cracking has been reported at the shear plane during direct shear cell experiments, [36][37][38][39] similar to the torn bands sometimes observed in HPDC. [15,16,22] The mechanisms that lead to defect band formation in controlled rheology experiments have recently been reported.…”

Internuclear Ophthalmoplegia Associated with Ipsilateral Downbeat Nystagmus and Contralateral Incyclorotatory Nystagmus

“…In the case of peripheral neurogenic and myogenic paresis, disturbance of the tonic and phasic functions would have been ex pected [13,17]. Myasthenia gravis is largely excluded in our case by the results of re peated Tensilon tests, other clinical exami nations using EOG velocity, EMG record ings and by spontaneous remission within 3 months [18].…”