Final answer:
To reduce passive movement of an impaled object in the eye, keeping both eyes closed is the best method. This prevents involuntary movement that could cause further injury. It's crucial not to attempt to remove the object, as it can exacerbate the damage.
Step-by-step explanation:
If an object is impaled in the eye, emergency care is imperative and certain measures can be taken to minimize further injury until professional medical help is available.
Among the options provided, keeping both eyes closed is the best method to reduce passive movement of the impaled object. This is because moving the uninjured eye can cause the injured eye to also move, potentially causing more damage. Therefore, it is advised to keep both eyes closed which often necessitates covering both eyes to prevent involuntary movement. It is critical to note that one should never attempt to remove the impaled object, as this could cause more damage or even permanent vision loss.
Placing the patient supine is not specifically effective in immobilizing eye movement as it relates to the impaled object, and keeping the uninjured eye open is counterproductive, as previously explained.