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In these classes desk blackboards are provided, and a great deal of oral instruction is given, and the amount of reading is limited. A great deal of handwork is required and everything possible is done to save eyestrain. Much time and thought is given to the proper lighting of schoolrooms, and to the color scheme of the buildings.
Nearsighted people should be especially careful to avoid eyestrain, and should not work by artificial light. Optic atrophy is an eye disease very baffling to oculists, sapping the vision slowly but surely, as a rule, but occasionally destroying eyesight in a very short time. Electricians and those working in chemical laboratories are susceptible to optic atrophy.
If, for some special reason, the oculist fears it would be unwise to tell the patient that blindness is imminent, he should at least urge him to conserve his remaining vision, and advise him to do as many things as possible by touch, and warn him of the consequences of eyestrain.
Higgins it was, home for a few days' relaxation from the fatigues of coffin selling, and garbed as usual in city clothes the splendor of which, as Captain Shad said afterwards, "would have given a blind man eyestrain." Daniel's arms were filled with purchases and he and Mary were standing beside the table where the toys and games were displayed. Mary was gazing at the toys; Mr. Higgins was not.
I have known this condition of the eye to be present in four successive generations, and in the last generation, the young woman became totally blind from detached retina, due to excessive eyestrain while in school.
A common cause of eyestrain is reading on street cars, or using the last, lingering bit of daylight to finish a chapter or complete some fine work. It is easier to turn on the light than to spend years in the dark.
"It is often true that monotony and discomfort are the cause of nervous and mental breakdown, witness the often-mentioned insanity among farmers' wives and the nervous breakdowns attributable to pain and strain, even though it be, as in many cases of eyestrain, so slight as not to be recognized by the patient."
"No," uttered Dan, "though I'm working my eyes three shifts to try to make out something. I'll have to go to an oculist as soon as I get through with this. This eyestrain is awful." Midshipman Dan Dalzell was really unconscious of the fact that he was joking. It was second nature with him; he would have jested unconsciously with death in its most awful form.
The Admiral's health was now ruined, for fevers, sleeplessness, gout, and eyestrain kept him in constant pain, and at times made even that strong mind of his a little queer and wobbly. But on one point at least it remained alert and lucid, he still could think out his course clearly.
Chronic irritability, moroseness, pathological impulses of all sorts, generally betokens eyestrain, dyspepsia, constipation, or some other bodily derangement. With the regaining of normal health the unruly impulses usually become quieter, sympathy flows more freely, the man becomes kinder, more tolerant, and morally sane.
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