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Br J Ophthalmol 83:664-669 doi:10.1136/bjo.83.6.664
  • Original Article
    • Clinical science

Inter- and intraobserver variation in the analysis of optic disc images: comparison of the Heidelberg retina tomograph and computer assisted planimetry

Table 3

Summary of intraobserver variation

Planimetry Coefficient of variation (%) HRT (standard reference plane) Coefficient of variation (%) HRT (“320 μm” reference plane) Coefficient of variation (%)
Disc area 1.5 2.4 2.4
Neuroretinal rim area 4.0 4.5 3.6
Rim volume — 8.4 4.7
Reference height — 5.7 0.0

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