1. Why does reading in the dark cause eye strain and headaches?
All, if not most reading today is done on PC and hand held devices. Reading from the print is fast becoming a lost art. Most individuals reading on the devices are not aware of the do’s and don’ts leading to a clinical condition called computer vision syndrome. The devices are self-illuminating, hence that isn’t a problem, but however, when used in a dark room the problem begins. A well illuminated room with little contrast between the screen and the surrounding is recommended. Frequent blinking to keep the eye moist is recommended, a minimum of 15 blinks per minute, or else the symptoms of computer vision syndrome start leading to a dry eye and strain. The top of the device also has to be kept at eye level.
Cones are the cells which take part in day vision and rods in night vision. If you try to read in the dark you will not be able to do so as cones will not get stimulated. A minimum of 20 foot candles is required for reading.
2. What is the right amount of light required for reading?
Relaxing on an arm chair while reading a book on a cozy night is what a lot of people love to do. Regardless of how and where you prefer to read a book, it is essential to ensure that the light in the surroundings in pleasant for the eyes. Good reading light can reduce any negative effects that they eye could have like strain, dryness or headaches. When choosing a good reading light, make sure you know where you would want to fix the light and where the light would be most concentrated.