id	keyword
hindsight-20170	optometry
hindsight-20170	retinoscopy
hindsight-20170	history
hindsight-20170	gregg
hindsight-20170	hindsight
hindsight-20170	journal
hindsight-20170	book
hindsight-20170	ohs
hindsight-20170	volume
hindsight-20170	years
hindsight-20170	school
hindsight-20170	pages
hindsight-20170	college
hindsight-20170	number
hindsight-20170	society
hindsight-20170	vision
hindsight-20170	aoa
hindsight-20170	practice