A magnetic resonance imaging study of double elevator palsy.

Objective: The pathophysiology of double elevator palsy is poorly understood. We assessed two patients with this condition using magnetic resonance imaging (MRI) to evaluate the appearance of the extraocular muscles.

Design: Cross-sectional study.

The 20-prism-dioptre base-out test: an indicator of peripheral binocularity.

Objective: To assess the ability of the 20-prism-dioptre base-out test to detect the presence of peripheral fusion in children too young to undergo formal sensory testing.

Design: Case series.

Setting: Pediatric ophthalmology service at the Children's Hospital of Western Ontario, London.

Ocular pursuit movement assessment by magnetic resonance imaging.

We describe a new technique for generating cinematic magnetic resonance images. This method produces more physiological imaging of extraocular muscles than our previous method. In addition, this technique provides more comfort for the study subject and results in less head movement artifact.

An animal model studying reconstruction techniques and histopathological changes in repair of canalicular lacerations.

We designed an animal model using sheep to evaluate three methods of canalicular reconstruction after laceration: direct sutured reapposition of the canaliculus without silicone intubation (4 eyelids), silicone intubation of the canalicular system without mucosal anastomosis (14 lids) and silicone intubation with mucosal anastomosis (10 lids). We also wished to determine the appropriate time of silicone tube removal. In the canaliculi repaired using silicone intubation the tubes were removed at 4, 8 or 12 weeks.