Eye opening is assessed using the GCS, which assigns scores based on the patient's response to various stimuli:
Spontaneous: The patient opens their eyes without any external stimulus (score: 4). To Speech: The patient opens their eyes when spoken to (score: 3). To Pain: The patient opens their eyes in response to a painful stimulus (score: 2). No Response: The patient does not open their eyes regardless of stimuli (score: 1).
