pupillary block glaucoma

pathology

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July 17, 2026

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Pupillary block glaucoma is a type of glaucoma where the flow of aqueous humor is blocked. This fluid normally circulates from the ciliary body, through the pupil, into the anterior chamber, and then drains away. In pupillary block glaucoma, the lens can push against the iris, blocking the pupil and preventing aqueous humor from reaching the drainage channels. This causes pressure to build up behind the iris, pushing it forward and closing the angle where fluid normally drains. This rapid increase in intraocular pressure can cause pain, redness, and vision loss. Treatment involves lowering the pressure, often with medication or surgery to create an opening in the iris.12

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eye disease
Glaucoma
…of angle closure glaucoma, called pupillary block glaucoma, the lens seals against the iris and blocks the flow of aqueous humor through the pupil. The root of the iris (which is rather thin) is then pushed forward because of increased posterior pressure, which closes the angle and prevents outflow of…
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…of angle closure glaucoma, called pupillary block glaucoma, the lens seals against the iris and blocks the flow of aqueous humor through the pupil. The root of the iris (which is rather thin) is then pushed forward because of increased posterior pressure, which closes the angle and prevents outflow of…
Read More