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Differences in parapapillary atrophy between glaucomatous and normal eyes: the Beijing Eye Study
Liang Xu1, Yaxing Wang, Hua Yang
1Beijing Institute of Ophthalmology, Beijing Tongren Hospital, Capital University of Medical Science, Beijing, China.
American Journal of Ophthalmology
|July 27, 2007
Summary
Parapapillary atrophy, specifically the beta zone, is significantly larger and more common in glaucoma patients compared to healthy individuals in a Chinese adult population. This finding holds true for both chronic open-angle and angle-closure glaucoma types.
Area of Science:
- Ophthalmology
- Optometry
- Glaucoma Research
Background:
- Parapapillary atrophy (PPA) is a common finding in optic nerve head imaging.
- PPA is often associated with myopia and aging.
- Its specific association with glaucoma requires further population-based investigation.
Purpose of the Study:
- To investigate the association between parapapillary atrophy (PPA) and glaucoma in a population-based study.
- To determine if different zones of PPA (alpha and beta) are linked to glaucomatous optic nerve damage.
- To compare PPA characteristics in different types of glaucoma.
Main Methods:
- A population-based cross-sectional study was conducted.
- The Beijing Eye Study included 4,439 participants (83.4% response rate).
- Optic disk photographs were morphometrically analyzed for parapapillary atrophy (alpha and beta zones).
Main Results:
- Glaucomatous optic nerve damage was detected in 2.3% of subjects (93 individuals).
- The beta zone of parapapillary atrophy was significantly larger and more frequent in eyes with glaucoma (P < .001).
- Beta zone area was independently associated with age, myopia, and glaucoma presence.
Conclusions:
- The beta zone of parapapillary atrophy is significantly larger and more prevalent in glaucomatous eyes compared to normal eyes in Chinese adults.
- No significant difference in beta zone area was observed between chronic open-angle glaucoma and primary angle-closure glaucoma.
- These findings highlight the beta zone of PPA as a potential indicator in glaucoma assessment.
