Not using the eyes before breakfast, as adjustment is slower and more difficult on first rising
Not reading on trains or other vehicles
Resting the eyes every fifteen or twenty minutes by looking up from the book at some distant object
Lamplight is easiest. Lights should always have a plain shade. Indirect lighting is best. Gaslight should have a Welsbach to give steady rays. White light is hard on the eyes; amber light, produced by amber shades, is easiest.
In selecting books for children, look for the following requirements:
Paper white or cream, without gloss
Lines short, preferably three inches
Margins wide
Print large
Wide spacing between lines