What scoring indicates an eye-opening response of 4 on the Glasgow Coma Scale?

The correct answer is that a score of 4 on the Glasgow Coma Scale indicates that the eyes open spontaneously. This scoring reflects the highest level of eye-opening response, signifying that the individual is alert and has a normal level of arousal without requiring any form of external stimulus.

In contrast, the other options represent varying degrees of responsiveness: opening eyes to a verbal command indicates a score of 3, as it shows a lesser degree of alertness compared to spontaneous opening. Opening eyes to pain corresponds to a score of 2, indicating a more reflexive response that requires a stronger stimulus. Lastly, not opening the eyes at all results in a score of 1, representing a lack of response. Thus, the description of a score of 4 as eyes opening spontaneously aligns correctly with the assessment parameters of the Glasgow Coma Scale.