Secondary Open Angle Glaucoma

Particulate or cellular elements present in the trabecu-lar meshwork can cause outflow obstruction. Examples are iatrogenic glaucoma (caused by silicone oil, topical steroids or viscoelastic substances used to coat lens implants), haemolytic glaucoma, lens protein glaucoma, post-traumatic glaucoma and glaucoma in association with tumours (caused by necrotic cells of malignant melanomas and retinoblastomas). The outflow system can also be blocked by melanin pigment granules released from iris stroma or pigment epithelium when the iris is traumatised or becomes atrophic.

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