Examinations showed that the first child was astigmatic and not obstinate; the boy had run a pin into one eye ten years before and destroyed its sight; while the second girl was found to be afflicted with diplopia, and in a friendly chat told the following story: "I very often see two words where there is only one.
"Civics and Health"
William H. Allen
This fantastic diplopia gradually gave place to the familiar variety and this occurred less and less often as my convalescence proceeded.
"Food Poisoning"
Edwin Oakes Jordan
When it is paralysed, there is defective movement of the eye downward and medially, and the patient may complain of diplopia when he looks downward.
"Manual of Surgery Volume Second: Extremities--Head--Neck. Sixth Edition."
Alexander Miles Alexis Thomson