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Effects of pupillary dilation on automated perimetry in normal patients.

The effects of pupillary dilation (tropicamide 1%) on automated static threshold perimetry were studied in 18 normal subjects using the Humphrey field analyzer 30-2 and STATPAC programs. The mean defect worsened by 0.83 decibels (standard deviation, 0.92 decibels) in dilated fields as compared with baseline visual fields (P = 0.001). These findings indicate that pupillary dilation in healthy subjects who are not receiving ocular medications produces statistically significant declines in threshold sensitivities. Valid comparison of results from serial visual field testing, therefore, depends on control of or adjustment for the effect of pupillary dilation.[1]


  1. Effects of pupillary dilation on automated perimetry in normal patients. Lindenmuth, K.A., Skuta, G.L., Rabbani, R., Musch, D.C., Bergstrom, T.J. Ophthalmology (1990) [Pubmed]
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