Bayoneting of vessels and bean-pot cupping in advanced glaucoma
Photographer: Jody M. Troyer, CRA
- Glaucoma / Iris
Posted June 24, 2019
Glaucoma is an optic neuropathy characterized by remodeling of the optic nerve head with loss of neural tissue resulting in distinctive visual field defects . It is the leading cause of irreversible blindness worldwide, and by the year 2040, an estimated 111.8 million individuals will be affected . Historically, visualization of the optic nerve head has been used to assess disease severity. The optic nerve head contains a cup which is delineated by the neuroretinal rim. Normal cup-disc ratios range from 0.1 to 0.4, but as neural rim tissue is lost, the cup progressively enlarges and the underlying lamina cribrosa becomes more apparent . In severely advanced glaucoma with complete loss of retinal tissue, retinal vessels may disappear as they make a sharp turn into the cup, termed bayoneting or "bean-pot" cupping. Deeper vessels as they re-emerge may appear out of focus .
See related atlas entry: Lamina cribrosa in primary open angle glaucoma
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