James McLellan

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While it is now established that astigmatism is more prevalent in infants and young children than in the adult population, little is known about the functional significance of this astigmatism, especially its role, if any, in emmetropization and the development of myopia. Manifest refractions (mean of 16 per subject) were obtained from 245 subjects starting(More)
—An augmented form of Petri net, referred to as a choice-point net, that can capture timing and probability constraints is introduced. Choice-point nets were developed to model health-care protocols, in which the events or actions taken by health-care professionals, institutions and patients occur either at prespecified times or after a prespecified lapse(More)
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