Glaucoma detection with the Heidelberg retina tomograph 3

Area of Science:

• Ophthalmology
• Medical Imaging
• Glaucoma Research

Background:

• Glaucoma diagnosis relies on detecting optic nerve damage.
• Heidelberg Retina Tomograph (HRT) devices aid in quantifying optic nerve head parameters.
• Comparing HRT software versions is crucial for diagnostic accuracy.

Purpose of the Study:

• To evaluate and compare the diagnostic performance of Heidelberg Retina Tomograph version 3 (HRT 3) software against HRT version 2 (HRT 2).
• To assess the ability of both HRT 2 and HRT 3 to differentiate between healthy and glaucomatous eyes.

Main Methods:

• A retrospective cross-sectional study involving 71 healthy eyes and 50 glaucomatous eyes.
• HRT 2 data were analyzed using HRT 3 software.
• Discrimination was assessed using areas under the receiver operating characteristics (AROCs) curves.

Main Results:

• Individual stereometric parameters showed good discrimination, with linear cup/disc ratio and horizontal retinal nerve fiber layer curvature performing well.
• Overall classification by HRT 2 Moorfields regression analysis (MRA), HRT 3 MRA, and HRT 3 glaucoma probability score (GPS) yielded comparable AROCs (0.927, 0.934, and 0.880, respectively).
• Agreement between HRT 2 and HRT 3 MRA was good (kappa = 0.70), with HRT 3 identifying more abnormalities.

Conclusions:

• The glaucoma discriminating ability of HRT 3 software is comparable to HRT 2.
• HRT 3 glaucoma probability score analysis demonstrates potential for objective differentiation between healthy and glaucomatous eyes.