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A woman was investigated for suspected choroidal secondaries because of two smooth masses seen in her right fundus. It was subsequently noted that the size of the masses varied with changes in posture and position of gaze, and they were shown to be vortex vein varices. This case highlights the importance of considering vortex vein varices in the differential diagnosis of fundal masses.
Two cases are presented in which multiple episodic retrobulbar botulinum toxin injections have diminished incapacitating acquired oscillopsia and nystagmus and improved visual acuity. One transient ptosis occurred in six procedures. Improvement duration averaged approximately three months. This is a simple, safe and effective therapy where alternative treatments are typically unsatisfactory.
This paper discusses the problems of achieving grey scale in ferroelectric liquid crystal (FLC) devices due to the lack of symmetry in the switching schemes used (in comparison with anti-FLC devices where alternate cycles are of opposite polarity). Two interesting schemes are presented which allow recovery of symmetry in the switching of FLCs. These use either stroboscopic illumination, or a second...
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