The principles of health control . still furtherencouraged. Indirect and semi-indirect illumination (, page 268), by which the glare is almost entirely avoided,is conducive both to health and comfort and is especiallydesirable in the home. Interior Decorations and the Eyes. — Surroundingsthat are restful to the nervous system (page 245) arelargely so from effects which they have, through the re-flection of light, upon the eyes. Since the wall coveringsand every object in a room reflect light, these should be Fig. 58.— One ofSeveral Ways bywhich properly pre-scribed lenses becomemisfits.
The principles of health control . still furtherencouraged. Indirect and semi-indirect illumination (, page 268), by which the glare is almost entirely avoided,is conducive both to health and comfort and is especiallydesirable in the home. Interior Decorations and the Eyes. — Surroundingsthat are restful to the nervous system (page 245) arelargely so from effects which they have, through the re-flection of light, upon the eyes. Since the wall coveringsand every object in a room reflect light, these should be Fig. 58.— One ofSeveral Ways bywhich properly pre-scribed lenses becomemisfits. The wearingof one lens higher thanthe other often de-velops fusion strain. EYE HYGIENE AND THE NERVOUS SYSTEM 267 selected with some reference to the nature of the lightwhich they throw off. In deciding upon interior decora-tions the following points should be kept in mind: 1. Color. — Natures colors — the blues, greens, andbrowns—-are restful to the eyes, while the reds, yellows,and purples are more or less Fig. 59. — A Preventable Cause of Eyestrain. Many otherwisecomfortable auditoriums are spoiled through faulty illumination. Onlythe strongest eyes can take the direct glare without injury. 2. Surface. — Smooth, polished surfaces reflect lightwithout breaking it up, as does a mirror, while the dull,rough surfaces break up and soften the light, causing itto be more restful. 3. Quantity of light entering the room. — Since lightershades of color reflect more light and darker ones less,the first are to be preferred in wall decorations for roomsreceiving insufficient light from the outside and the secondfor rooms receiving an excess of light. The Eyes of Children. — In seeking nerve rest through 268 PRINCIPLES OF HEALTH CONTROL the eyes for himself, the adult should not forget the eyesof children. If relief from eyestrain is secured when it is first needed, the problemnot only of the eyes but ofnervous health becomes de-cidedly easier. Eyestrain isl
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