A nurse is caring for a client who sustained a blunt trauma to the right eye resulting in a contusion. Which assessment finding would be the priority concern requiring immediate intervention?

Sudden severe eye pain with nausea/vomiting indicates increased intraocular pressure, a vision-threatening emergency. Other findings are less urgent.

Understanding the Priority: Recognizing Orbital Compartment Syndrome

Following blunt trauma to the eye, a contusion typically presents with benign findings such as periorbital ecchymosis or subconjunctival hemorrhage. However, the nurse must be able to distinguish these expected findings from the early, subtle signs of a sight-threatening emergency. The clinical presentation of orbital compartment syndrome (OCS) is a time-critical diagnosis where irreversible vision loss can occur if intervention is delayed ^[1][2].

The priority assessment finding is the sudden onset of severe eye pain accompanied by nausea and vomiting. This cluster of symptoms signals an acute rise in intraocular pressure (IOP) or intraorbital pressure. The pathophysiology involves a space-occupying lesion, most commonly a retrobulbar hematoma (bleeding behind the globe) or tension orbital emphysema (air trapping), within the confined bony orbit ^[2][3]. As pressure increases, it compresses the optic nerve and central retinal artery, leading to ischemia. The vagal response triggered by the sudden, severe pain and increased pressure on the globe stimulates nausea and vomiting, a classic but often overlooked red flag in ocular emergencies.

Analysis of Assessment Findings

Assessment Finding	Clinical Significance & Rationale
1. Mild periorbital edema and ecchymosis	This is an expected finding following blunt trauma and contusion. While it requires monitoring, it does not independently indicate a compartment syndrome. Periorbital ecchymosis and hematoma are common and typically self-limiting [2].
2. Sudden onset of severe eye pain with nausea and vomiting	Priority concern. This is the hallmark presentation of acute OCS. The severe pain results from rapid stretching of pain fibers due to elevated pressure, and the oculocardiac reflex triggers nausea and vomiting. This requires immediate intervention, such as an emergency lateral canthotomy and cantholysis, to decompress the orbit and restore perfusion to the optic nerve [1][4].
3. Subconjunctival hemorrhage with blood visible in the sclera	While visually alarming, a subconjunctival hemorrhage in the context of blunt trauma is generally a benign finding that resolves spontaneously. It does not cause an increase in orbital pressure unless it is associated with a deeper, expanding retrobulbar hematoma [3].
4. Photophobia and excessive tearing	These findings are consistent with traumatic iritis or a corneal abrasion, which are painful but not immediately sight-threatening in the same rapid timeframe as OCS. They do not reflect the compressive ischemic process of a compartment syndrome.

Clinical Decision-Making and Pathophysiology

The nurse’s primary concern is preventing permanent vision loss. In OCS, the retina and optic nerve can suffer irreversible ischemic damage within 60 to 120 minutes. The presence of severe pain with nausea and vomiting in the setting of blunt trauma should immediately raise suspicion for a retrobulbar hemorrhage or tension emphysema that is actively expanding. A documented case highlighted that a patient with an orbital floor fracture developed OCS with a measured IOP of 28 mmHg, demonstrating that the pressure increase may not always be extreme initially but is clinically devastating ^[2]. Another case report emphasized that following blunt trauma, progressive eye pain and decreased extraocular movement were key clinical findings consistent with a retrobulbar hematoma leading to OCS, necessitating an emergency lateral canthotomy at the bedside before transfer to a tertiary center ^[1]. The combination of severe pain and vagal symptoms (nausea/vomiting) is the most specific early warning sign that differentiates a benign contusion from an evolving compartment syndrome, demanding immediate escalation and intervention ^[1][4].