When should a rigid eye shield be placed over both eyes?

A rigid eye shield should be placed over both eyes when both eyes are confirmed or strongly suspected to be injured because this practice helps protect the injured eyes from further damage and reduces the risk of worsening any existing injuries. Covering both eyes can also help limit movement, which is essential since even minor eye movements can exacerbate the situation if one eye is injured. Furthermore, the eyes work together, and protecting both ensures that any potential injury is managed appropriately.

Addressing the context of the other choices, placing a shield when the casualty is fully conscious may not provide essential protective benefits if injuries to the eyes are not evident. Similarly, the display of severe pain does not directly indicate that injuries are present; thus, shielding should not occur solely based on pain levels. Finally, if the structural integrity of the eye is compromised, it’s vital to protect the affected eye but would not necessitate covering the uninjured eye unless both are suspected or confirmed to be injured. Hence, option B is the best choice for ensuring comprehensive protection in suspected dual injuries.