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When managing a hyphema, positioning the patient at a 30-45 degree angle is beneficial for several reasons. This position helps to reduce intraocular pressure and minimizes the risk of further bleeding by preventing blood from pooling in the anterior chamber of the eye. By elevating the head, this position aids venous drainage, improving overall ocular circulation while decreasing the likelihood of complications.

Additionally, maintaining a moderately elevated position can enhance comfort for the patient and reduce the sensation of pressure within the eye. This angle strikes a balance that neither fully reclines the patient (which could lead to increased pressure in the eye) nor positions them so upright that it increases the risk of exacerbating the condition.

In contrast, lying flat on their back could facilitate blood pooling in the anterior chamber, while being seated upright might create discomfort and does not optimize venous drainage. Lying on the affected side may lead to an altered pressure gradient in the eye and could inadvertently worsen bleeding by allowing blood to collect in a way that compromises visibility or increases pressure in the affected area.