DILLARD

"One patient called lemonade 'square' because it pricked on his tongue as a square shape pricked on the touch of his hands"
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Dillard is discussing a book she read written by a doctor who works with patients who have been blinded by cataracts. Dillard is affected by this book. At the end of the section, she says that her own vision was affected by what the author of the book wrote for weeks. the blind person is discribing lemonade as square because it is sour and pricks his taste buds like a corner would prick his hand. This could be because he has no vision and cannot relate a square in its context and beleives that tasting is just like touching.