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[Pathogenesis and clinical classification of the malignant glaucoma]
1Zhongshan Ophthalmic Center, Sun Yat-sen University of Medical Sciences, Guangzhou 510060, China.
Yan Ke Xue Bao = Eye Science
|February 13, 2003
Summary
Malignant glaucoma may stem from ciliary block or iris lens displacement, leading to similar symptoms like shallow anterior chambers and aqueous misdirection. This study proposes a two-type classification for malignant glaucoma.
Area of Science:
- Ophthalmology
- Pathogenesis of Glaucoma
Background:
- Malignant glaucoma is a severe form of angle-closure glaucoma.
- Understanding its pathogenesis is crucial for effective clinical management and classification.
Purpose of the Study:
- To investigate the underlying mechanisms of malignant glaucoma.
- To establish a basis for the clinical classification of malignant glaucoma.
Main Methods:
- Ultrasound biomicroscopy (UBM) and ocular ultrasonography were used to examine 12 eyes with malignant glaucoma.
- Ocular anatomical structures were compared with those of the fellow eyes.
- Clinical ophthalmic tests and diagnostic therapy were performed.
Main Results:
- Ciliary block was identified in 33.3% of cases, associated with narrow anterior segments.
- Iris lens diaphragm anterior displacement was observed in 76.6% of cases, with passive ciliary body deformation.
- Diagnostic surgery revealed vitreous cavity fluid in 6 of 7 operated eyes.
Conclusions:
- Malignant glaucoma can be classified into two types: ciliary block and lens iris block.
- Both types share pathophysiological characteristics including shallow anterior chamber and aqueous misdirection.
- While symptoms overlap, the precise pathogenesis may differ between the two proposed types.