Page 76 - طب بديل مقصه_Neat

brighter: a cloudy, gray winter d ay is around 4,000 lux and a sunny day can be
50,000 lux to 100,000 lux or more.
The most effective dose has been reported to be 10,000 lux for 30 minutes daily;
lower intensities (i.e., 2,500 lux) can also be effective, however, they require longer
durations of 2 to 3 hours . It is recommended that broad-spectrum white light from
fluorescent lamps in which the ultraviolet (UV) and infrared (IR) light are being
filtered be used because UV and IR wavelengths are potentially damaging to the
eyes.

Side Effects of Light Therapy:

Adverse effects associated with light therapy are often attributed partially to factors
such as parameters of light exposure, timing, dose (intensity, duration) and method of
exposure (diffused, direct, focused). For example, if morning light is timed too early,
patients experience premature awakening, with difficulty falling sleep again. If, on
the other hand, evening light is scheduled too late, patients experience initial
insomnia and hyperactivity.
Other common side effects reported are headache, eyestrain, agitation, or feeling
nervous or tense. Less common but more serious side effects of mania and
hypomania have been reported.

Contra-indications of Light Therapy:

The major contradictions for the use of light therapy are retinal disease or diseases
that may involve the retina, such as diabetes; it is also contraindicated for those
taking photosensitizing medications, such as lithium, phenothiazine antipsychotics,
melatonin, An ophthalmologic examination is often recommended for these high-
risk patients before starting light therapy.

75