Don't you want to attribute the author? Colors Display Shapes. Select a color from the icon Choose a new color. Move left. Move right. Move up. Move down. Flip Flip horizontal. Flip vertical. Select a shape None. Rounded square. You have reached the icons limit per collection icons. Pinterest Facebook Twitter. Sort by Popular Popular Recent. See separate leaflet called Depression for more details. Light intensity is measured in lux.
Ordinary light bulbs are not strong enough, as they only give out lux. To treat SAD you need a light source of at least lux about ten times that of ordinary light bulbs. Special light boxes are made for the purpose of treating SAD. There are various shapes and sizes. Perhaps the most commonly used one is a box about the size of a sheet of A4 paper that stands on a desk or table.
Follow the instructions that come with the box. This may be something like:. Some people use a dawn simulator instead of, or in addition to, a light box. Dawn simulators are devices that slowly increase the room light. They gradually come on in the early morning over a period of around minutes at the time just prior to when you normally wake up. The logic is that it replaces the bright sunlight which you normally see in the summer.
However, it is not clear exactly how it works. It is not simply extending the length of the daylight hours. Bright light affects the back of the eye the retina which sends nerve signals to parts of the brain. This is thought to affect the level of certain chemicals and hormones which you make in parts of the brain which affect mood.
Many people notice an improvement in symptoms within days. If symptoms improve, they tend to stay improved so long as you keep on with treatment every day until spring. In some cases it takes up to weeks of treatment for symptoms to improve. It does not work in every case but it is thought that around 8 in 10 people with SAD experience improvement with light therapy.
See your doctor for other treatment options if you do not notice an improvement after three weeks. There is a theoretical risk of damaging the retina.
However, there do not seem to be any reports of harm with the specially designed light boxes. The light boxes used to treat SAD do not emit much ultraviolet UV light the main damaging part of sunlight to the skin and eyes.
Side-effects occur in some people and include headaches, difficulty sleeping after an evening session of light therapy, irritability and tiredness. Note : you should not use suntan machines as a source of bright light. Can view their Appointments, booked by admin. Can delete their Appointment, when doctor attended their appointment. Patient Create account for admit in hospital. Then Login Approval required by hospital admin, Then only patient can login.
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