What is the name when blood partially fills the anterior chamber?

The correct term for blood partially filling the anterior chamber of the eye is hyphema. This condition occurs when there is bleeding in the space between the cornea and the iris, often resulting from trauma, surgery, or other ocular issues. The presence of blood in the anterior chamber can lead to increased intraocular pressure and may require medical evaluation and treatment to prevent complications, such as vision loss.

Other choices, while related to bleeding, do not specifically refer to the accumulation of blood in the anterior chamber. For example, a hemorrhage can refer to bleeding in any tissue or organ, and choroidal effusion involves fluid rather than blood in the choroid layer behind the retina. Retrobulbar hemorrhage refers to bleeding behind the eye, which is a different condition altogether.