Morphologic predictive factors for development of optic disc hemorrhages in glaucoma

Area of Science:

• Ophthalmology
• Glaucoma Research
• Optic Nerve Head Imaging

Background:

• Chronic open-angle glaucoma (COAG) is a progressive optic neuropathy.
• Optic disc hemorrhages can indicate glaucoma progression.
• Identifying predictive factors for disc hemorrhages is crucial for patient management.

Purpose of the Study:

• To determine which optic disc parameters predict the development of disc hemorrhages in patients with COAG.
• To differentiate predictive factors for hemorrhages from those associated with general glaucoma progression.

Main Methods:

• Prospective observational study of 432 eyes from 281 COAG patients.
• Eyes categorized into hemorrhagic, rim loss, and stable groups based on follow-up findings.
• Repeated color stereo optic disc photography with qualitative and morphometric evaluation.

Main Results:

• A smaller neuroretinal rim area and larger parapapillary beta zone at baseline were significantly associated with hemorrhages.
• Neuroretinal rim area was the sole significant predictor of hemorrhages in multivariate analysis.
• No significant differences in optic disc parameters were found between hemorrhagic and rim loss groups.

Conclusions:

• Small neuroretinal rim area and potentially large parapapillary beta zone are morphologic predictors of disc hemorrhages in COAG.
• Disc hemorrhage development is independent of optic disc size, shape, cup depth, alpha zone, and vessel diameter.
• Eyes with hemorrhages and eyes with progressive rim loss show similar baseline optic nerve head appearances.