Seasonal affective disorder is a depression experienced by people particularly during the winter. This kind ofdepression occurs more frequently on people who live in those parts of world where there is less or little 41 to sunlight.People who have this kind of depression will experience a change in their mood when the seasons change. Thisexperience of mood change is most apparent when the winter 42 with less daylight. When contracting this disease,people will have such symptoms as sleeping too much, having little energy, and feeling depressed. But these symptomscan be resolved 43 people receive treatment. One such a treatment includes a light therapy which enables people toreceive daylight or sunlight 44 modern technology. For instance, people can sit before a light box and get as muchlight as they need for curing their disease. Nowadays scientists have made great efforts to discover different ways ofreducing the discomfort this depression may cause to people. Although this kind of disease may be hard to be avoidedto some people, it can be 45 and even cured to allow patients to have a normal life.