The Causes and Prevention of Near-Sightedness #270706

These considerations induce me to speak of the causes and the prevention of myopia, though I must content myself with a gene ral sketch, as want of time does not permit me to treat exhaustively of the subject. Before proceeding to the consideration of these questions, let me, for the sake of clearness, premise a concise explanation of the compass of vision in normal and in near-sighted eyes.