There is ample evidence that chronic simple glaucoma has familial tendencies.1 Investigations by Becker et al2 and Miller and Paterson3,4 demonstrated that close relatives and descendants of patients with simple glaucoma have increased values for Po, reduced values for C, and thus elevation of Po/C—all in significant amounts. However, such investigations have been confined largely to subjects above 20 years of age, with the youngest being 13 years. Since there is an apparent paucity of tonographic data relative to the younger age group, it seemed reasonable to assess the norms of intraocular pressure and outflow for children.
Preliminary studies suggested that good tonograms could be obtained in subjects as young as 11 years, but tonograms taken on children younger than this were not consistently reliable. Accordingly, 96 children, comprising 54 girls and 42 boys ranging in age from 11 to 13 years, were investigated. The
GRAFF E, DYSON C. Outflow Studies in Children. Arch Ophthalmol. 1965;74(1):36–37. doi:10.1001/archopht.1965.00970040038008
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