Width of abnormal ganglion cell complex area determined using optical coherence tomography to predict glaucoma

Area of Science:

• Ophthalmology
• Medical Imaging
• Glaucoma Research

Background:

• Glaucoma diagnosis relies on detecting structural damage.
• Ganglion cell complex (GCC) and retinal nerve fiber layer (RNFL) thickness are key indicators.
• Spectral-domain optical coherence tomography (SD-OCT) provides detailed retinal imaging.

Purpose of the Study:

• To evaluate the diagnostic capability of GCC parameters, particularly abnormal area width, in various glaucoma stages.
• To compare the efficacy of GCC and RNFL parameters in glaucoma detection.

Main Methods:

• SD-OCT was used to assess GCC and RNFL parameters in glaucomatous and normal eyes.
• Image J software quantified the width of abnormal GCC areas.
• Regression analyses and ROC curves determined the diagnostic potential of various parameters.

Main Results:

• Nonlinear relationships were observed between abnormal GCC area and other GCC parameters.
• Changes in GCC and RNFL thickness, and global loss volume (GLV), preceded abnormal area expansion.
• Abnormal GCC area width showed diagnostic performance comparable to other parameters.

Conclusions:

• OCT thickness parameters may decrease faster than area parameters in early glaucoma.
• The size of abnormal GCC areas is the most relevant parameter for glaucoma detection.
• SD-OCT imaging offers valuable insights into glaucoma progression and diagnosis.