Same language, opposite meaning because of a particular noun + context.
I think the only thing obvious here is that there is no obvious solution other than adding lots of clarification to your prompt.
If you are facing a wall-plate with two power sockets on it side by side and you are telling someone to plug something in, which one would be "the right socket", and which would be "the left socket"?
If above the wall-plate is a photo of a person and you are someone to draw a tattoo on the photo, which is "the right arm" and which is "the left arm"?
Same wording, different expectation.
ETA: and if I were telling someone which socket to plug something into, it would absolutely be from the prospective of the person doing the plugging, not from inside the wall.
Agreed. So the "obvious" meaning of left and right differ depend on context, which is what pphysch was pointing out.
Also context matters, if you're talking to someone you would say "right shoulder" for _their_ right since you know it's an observer with different vantage point. Talking about a scene in a photo "the right shoulder" to me would more often mean right portion of the photo even if it was the person's left shoulder.
Does it still use the viewer's perspective if the prompt specifies "Put a strawberry in the _patient's left eye_"? If it does, then you're onto something. Otherwise I completely disagree with this.