Correlation of various optic nerve head parameters obtained by 3D non‐mydriatic retinal camera and optical coherence tomography (OCT)

Abstract

AbstractPurpose To evaluate the relationship between various optic nerve head parameters(ONHP) provided by 3D non‐mydriatic retinal camera and OCT. Agreement in assessing the disc damage likelihood scale (DDLS) using 3D monitor between trainees and the validity of the DDLS provided by the integrated algorism of 3D retinal camera were also investigated.Methods Patients(122 eyes from 82 patients) were categorized as normal, glaucoma suspect and glaucoma groups. Stereoscopic images were taken by 3D non‐mydriatic retinal camera(Nonmyd WX 3D,Kowa company Ltd.,Japan) and various ONHP provided by the instrument were used. To access the agreement in assessing the DDLS between trainees, initially DDLS score was graded using slit lamp by each observer and then each observer was provide with the 3D image of the optic nerve head using 3D monitor and was asked to re‐grade the DDLS according to their findings. OCT was performed to acquire retinal nerve fiber layer analysis and optic nerve head analysis.Results There was a good correlation between various ONHP obtained by 3D non‐mydriatic retinal camera and OCT. The interobserver agreement of the DDLS evaluated through the 3D monitor was excellent(0.91), whereas the interobserver agreement of the DDLS evaluated clinically by slit lamp was substantial (0.80). The DDLS evaluated by the integrated algorism of 3D non‐mydriatic retinal camera was not itself satisfactory in the diagnosis of glaucoma. ROC curve shoed that DDLS evaluated using 3D monitor had the best predictive power(0.93).Conclusion ONHP obtained by 3D non‐mydaiatic retinal camera are useful in evaluating patients with glaucoma, however, the integrated algorism of the device to calculate the DDLS needs to be improved.