Variabilidad entre expertos al delimitar el borde y área papilar

  1. Silvia Alayón Miranda
  2. Manuel Antonio González de la Rosa
  3. F.J. Fumero
  4. José Francisco Sigut Saavedra
  5. José Luis Sánchez de la Rosa
Archivos de la Sociedad Española de Oftalmologia

ISSN: 0365-6691

Year of publication: 2013

Volume: 88

Issue: 5

Pages: 168-173

Type: Article

Export: RIS
DOI: 10.1016/j.oftal.2012.07.008 DIALNET GOOGLE SCHOLAR


Objective: Estimation of the error rate in the subjective determination of the optic nerve head edge and area. Method: 1) 169 images of optic nerve disc were evaluated by five experts for the defining of the edges in 8 positions (every 45°). 2) The estimated areas of 26 cases were compared with the measurements of the Cirrus Optical Coherence Tomography (OCT-Cirrus). Results: 1) The mean variation of the estimated radius was ±5.2%, with no significant differences between sectors. Specific differences were found between the 5 experts (P <.001), each one compared with the others. 2) The disc area measured by the OCT-Cirros was 1.78 mm² (SD =0.27). The results corresponding to the experts who detected smaller areas were better correlated to the area detected by the OCT-Cirrus (r=0.77-0.88) than the results corresponding to larger areas (r =0.61-0.69) (P <.05 in extreme cases). Conclusions: There are specific patterns in each expert for defining the disc edges and involve 20% variation in the estimation of the optic nerve area. The experts who detected smaller areass have a higher agreement with the objective method used. A web tool is proposed for self-assessment and training in this task.