Computer-assisted analysis of the normal photopic electroretinogram.
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Biomedical subjects
Publications and source records attributed to K J Fritz.
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A man of 21 years and his sister aged 20 years had congenital bilateral horizontal gaze palsy. Convergence was normal but the vestibulocephalic and oculocephalic reflexes were absent. Aplasia of the paramedian zone of the pontine tegmentum, on a familial basis, is postulated as the cause.
Computers are being investigated as diagnostic aids in many fields of medicine. Models employing Bayes' theorem, a statistical formula, commonly are used to supply valuable information on the likelihood of each disease in the differential diagnosis to help the clinician make the diagnosis. However, knowledge of elementary decision analysis is beneficial to help understand the current and potential uses of these models. We discussed Bayes' theorem as an introduction to decision analysis. Moreover, we described a Bayesian model for the differential diagnosis of leukocoria to illustrate the application of computers to ophthalmologic diagnosis.
We examined two patients who developed unilateral inferior rectus muscle palsy following inferior oblique myectomy. Surgical exploration showed a normal inferior rectus muscle and tendon in both patients. Surgical correction consisted of inferior rectus resection in one patient and inferior rectus resection combined with an ipsilateral superior rectus recession in the other. We propose inadvertent excision of the lateral portion of the inferior rectus muscle during inferior oblique myectomy as the probable mechanism of inferior rectus injury.
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