An individual’s capacity to see and ways to measure, protect, and assist vision vary.
A buggy or horseback rider in 1770 had no billboards or road signs to read. Before the beginning of free public schools in the 1840s, few people could read well, books other than the Bible were rare, and newspapers were scarce. How or if a person used words was not a universal measure of one’s worth. Standards of vision or reading comprehension were not relevant for many kinds of work and activities.
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