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C.B. James, A. Shaikh, C. Ames; Efficacy of Mydriasis on the Assessment of Optic Disc Stereometric Parameters by the Heidelberg Retina Tomograph . Invest. Ophthalmol. Vis. Sci. 2003;44(13):3371.
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© ARVO (1962-2015); The Authors (2016-present)
Purpose: To assess the effect of mydriasis on optic disc stereometric parameters’ measurement by the Heidelberg Retina Tomograph II (HRT). Methods: Thirty eyes of fifteen patients (age range) (mix of healthy subjects and those with glaucoma) were evaluated. One trained technician made all HRT measurements. Each patient had two images for each eye prior to and following dilatation (eight in total). All examinations were evaluated for optic disc area, cup area, rim area and retinal nerve fiber layer (RNFL) cross-section area prior to and following dilatation. The presence of any statistical difference in measurements was tested with paired T-tests. Results: There was no significant differences in any of the stereometric or RNFL parameters measured. Mean disc area was 2.23 + 0.57 pre-dilation, 2.20 + 0.61 post dilation; mean cup area was 0.57+ 0.39 pre-dilation, 0.57+ 0.39 post-dilation; mean rim area was 1.66+ 0.67 pre-dilation, 1.63+ 0.68 post dilation; mean RNFL as 1.29+ 0.49 pre-dilation, 1.35+ 0.55 post dilation. Conclusion: Dilation of the pupil does not alter the measurements obtained with the HRTII.
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