The use of HRT with and without the aid of disc photographs.
Loon Seng Chee, Tong Louis, Gazzard Gus, Chan Yiong Huak, Sim Ee Ling, Aung Tin, Tan Donald T H, Healey P R, Wong Tien Yin, Koh Victor
AI Summary
This study found HRT optic disc measurements are highly consistent with or without disc photos for contouring, suggesting photos may be omitted in large studies to save time/cost without significant data loss.
Abstract
Purpose
To evaluate the measurement of optic disc morphology using Heidelberg Retinal Tomography (HRT) with and without the aid of optic disc photos.
Methods
One hundred three children (aged 11 and 12 y, 52 boys) were selected randomly from the Singapore Cohort study of Risk Factors for Myopia. Optic nerve head topography and retinal nerve fiber layer thickness measurements were assessed using the HRT-II (Heidelberg, Germany) scanning laser ophthalmoscope. All contour lines were drawn by the same researcher on 2 occasions. The first drawing was made without optic disc photographs but using the 3-dimensional rotation assessment. The second drawing was made with the additional aid of digital monoscopic optic disc photographs.
Results
There was a high correlation between the measurements taken with and without optic disc photographs. For the global disc area, the difference between the mean readings was 0.67 mm and the intraclass correlation (ICC) was 0.81 [95% confidence interval (CI) 0.73-0.86]. The mean difference for the global cup-to-disc ratio was 0.03 [ICC 0.86 (95% CI 0.80-0.90)]. The ICCs were high across almost all of the readings except rim volume, in which the ICC was 0.57 (95% CI 0.43-0.69).
Conclusions
This study shows minimal differences in HRT measured optic disc parameters when optic disc photos are used to aid in the definition of the scleral ring. Omitting the use of disc photographs in measuring HRT outputs may translate into significant savings in time and logistics in simultaneously obtaining HRT and optic disc photographs in large population-based studies.
MeSH Terms
Shields Classification
Related Articles5
Sleep Disturbance as a Risk Factor for Retinal Neurodegeneration and Subsequent Glaucoma.
Observational StudyAssociation of Optic Nerve Head Metrics and Parapapillary Gamma Zone With Myopia Onset and Progression in Children: The Hong Kong Children Eye Study.
Cohort StudyComparison of Deep Learning and Clinician Performance for Detecting Referable Glaucoma from Fundus Photographs in a Safety Net Population.
Cohort StudyPredicting Retinal Nerve Fiber Layer Thickness From Ocular Hypertension Treatment Study Optic Disc Photographs.
Cohort StudyPhysiological change in ganglion cell inner plexiform layer and nerve fibre layer thickness over six years.
Cohort StudyIs this article assigned to the wrong chapter(s)? Let us know.