What are causes of secondary glaucoma?

• A. Lens Associated, Traumatic, Uveitis Associated, Intraocular Tumors
• B. Primary Open-Angle Glaucoma
• C. Diabetic Retinopathy
• D. Retinal Detachment

Answer: (A)

Secondary glaucoma occurs when elevated intraocular pressure is driven by another eye condition rather than a primary dysfunction of the drainage system itself. The examples given—lens-related problems, trauma, uveitis, and intraocular tumors—fit this idea because each can directly alter or block the aqueous outflow.

Lens-associated issues can cause angle closure or pupillary block, narrowing the drainage angle and raising pressure. Trauma can injure the angle or create adhesions (synechiae) that impede outflow. Uveitis brings inflammation and inflammatory debris, leading to synechiae and increased resistance in the trabecular meshwork. Intraocular tumors can physically obstruct the outflow path or release factors that worsen drainage or promote congestion.

Primary open-angle glaucoma, by contrast, is a glaucoma with no identifiable secondary cause and typically involves gradual dysfunction of the drainage system despite a open angle. While diabetic retinopathy can lead to secondary glaucoma in some cases (through neovascularization), the listed lens, trauma, uveitis, and tumor categories are direct, classic sources of secondary glaucomas.