id	keyword
hindsight-3598	article
hindsight-3598	book
hindsight-3598	donders
hindsight-3598	refraction
hindsight-3598	lenses
hindsight-3598	spectacles
hindsight-3598	pages
hindsight-3598	eye
hindsight-3598	astigmatism
hindsight-3598	rogers
hindsight-3598	dutch
hindsight-3598	bosch
hindsight-3598	reading