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138 LIEUT. J. MONJARDINO : SOME NOTES ON PORTUGUESE SURGERY. the factors described above was present in every case. A boy, for instance, will state that he had no trouble with his eyes until after he had left school, but in his employment, where he had continually to lift heavy boxes, began to get more and more short-sighted. Then he will complain of a feeling of great tension in the eyes and headache after much lifting. The ordinarily given causes of myopia cannot apply in a large number ofdoi:10.1016/s0140-6736(01)23192-4 fatcat:fyr2zeoucvfi5pl6uftu3qlhge