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[Association between watershed zone and visual field defect in normal tension glaucoma]
Nippon Ganka Gakkai Zasshi
|October 1, 1998
Summary
The location of the watershed zone impacts normal tension glaucoma progression. Eyes with watershed zones encroaching more on the optic nerve head showed worse visual field defects.
Area of Science:
- Ophthalmology
- Neuroscience
Context:
- Normal tension glaucoma (NTG) is a progressive optic neuropathy.
- The role of watershed zones in glaucomatous optic damage is not fully understood.
Purpose:
- To investigate the association between the location of the watershed zone and glaucomatous optic damage in NTG patients.
Summary:
- Indocyanine green fluorescence angiography and scanning laser ophthalmoscopy were used to assess watershed zones in 54 eyes of 27 NTG patients.
- Watershed zones were classified into three types based on their inclusion of the optic nerve head.
- A significant correlation was found between the extent of optic nerve head involvement by the watershed zone and the severity of visual field defects (mean deviation).
Impact:
- Findings suggest that the watershed zone's location is a critical factor influencing the progression of visual field defects in normal tension glaucoma.
- This research may inform targeted therapeutic strategies for glaucoma management.