Imagine the guy had taken the other one ...
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>A guy who lost an eye goes looking for someone to transplant a good eye to him, but alas, the science hasn't progressed that far. Eventually he does find a doctor who knows how to do it, secretly. The trouble is to find a donor, and the doctor gives him a handy little freezer box and the special knife, and tells him to patrol the highway to find a fresh fatal accident, pick the eye, substitute his glass eye to cover the excision, and go to the clinic within hours. He does so and everything goes fine.
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>The headline in the next day's newspapers: "Driver with two glass eyes causes a crash".