How should you treat a casualty's eye injury?

When treating a casualty's eye injury, applying a bandage to both eyes is essential because it helps to prevent further damage and reduces the risk of movement in the injured eye. The human eyes work in coordination; thus, when one eye is injured, binding both can help in preventing strain or involuntary movements that could exacerbate the injury. This method also helps in keeping the injured eye still, allowing it the best chance for healing and protection.

While flushing with water may be appropriate for certain types of chemical exposure, it is not a universal treatment for all eye injuries. Applying a bandage to just one eye is inadequate, as the uninjured eye may still move and could lead to further issues. Using a cold compress might provide some comfort but would not adequately protect the eye or prevent further complications associated with the injury. Therefore, covering both eyes is the most effective method in stabilizing the situation until further medical assistance can be provided.