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Light therapy Light therapy is the expoasure of the artifical light or light of certain wave lenght or frequency on the human bodies by using

Light therapy
Light therapy is the expoasure of the artifical light or light of certain wave lenght or frequency on the human bodies by using .polychromatic polarised light(a mono chromatic incoharet light), lasers, light-emitting diodes, fluorescent lamps it is most common meothed to treat different diseases In light thearpy we sit or work close to a gadget called a light treatment box.The gadget radiates brilliant light that impersonates regular outside light.
Light treatment is thought to influence brain chemicals connected to temperament and rest, facilitating SAD side effects. Utilizing a light treatment box may likewise help with different sorts of sadness, rest issue and different conditions. Light treatment is otherwise called brilliant light treatment or phototherapy.

Reasons
The doctors recommened to use light therapy because it helps us to overcome many seasonal effects it is safe but may have some side effects on body
It increase the effect of the antidepressant medication(the treatment of many depressive diseases i.e anxiety disorder) it may also help you to lower the dose of the antidepressant medicine and avoid medication during breast feeding 

Types of light thearpy
It has many types and some of them are given
Red light thearpy
Ultravoiletrays therapy
Ultravoiletray A
UltravoiletrayB
Bright light therapy
Red light therapy
It is the most suitable type of threapy Red light therapy (RLT) is a procedure that utilizes red low-level wavelengths of light to treat skin issues, for example, wrinkles, scars, and relentless injuries, among different conditions.

The scientist thought thatRLT could build vitality inside human cells. The scientists trusted that RLT could be a trusted method to treat the muscle decay or to increase its potential, normal injury mending, and bone thickness issues caused by weightlessness amid space travel.it is also used by NASA
You may also heard the names of red light therapy as follow
photobiomodulation (PBM)
low level light therapy (LLLT)
soft laser therapy
biostimulation
low-power laser therapy (LPLT)

Ultravoilet rays therapy
It is used for treatmant of skin diseasesor skin disordersIt comprises of illumination of the patient with the UVA band of bright light, as a rule conveyed from a bright light bulb uncommonly intended to yield the frequency of ultravoilet band from bulb
This treatment is like the light from great quality solariums however contrasts from the essentially UVB bright band used to treat psoriasis. Tanning beds are utilized both in dermatology rehearses for the treatment of corrective skin conditions, (for example, psoriasis, skin break out, dermatitis and vitiligo) and in indoor tanning salons for restorative tanning. Something like 88 percent of dermatologists prescribe the utilization of tanning hardware or salon tanning for customers to economically self-regard skin conditions as an advantageous option for customers in country areas, and also normally happening exposures including bright light from the sun.
Run of the mill treatment regimens include short presentation to UVB beams 3 to 5 times each week at a doctor’s facility or center, and rehashed sessions might be required before results are perceptible. All of the conditions that react to UVB light are endless issues, so nonstop treatment is required to hold those issues within proper limits. Home UVB frameworks are regular answers for those whose conditions react to treatment. Home frameworks allow patients to treat themselves each other day (the perfect treatment routine for most) without the successive, expensive outings to the workplace/facility and back.

Side effects may be itcitingand if a person expose most of his area to UV rays it can cause many diseases and may cause decay or harm muscles of the body
Advantages and disadvantages:
Advantages:
Treatment of depression that don’t occur seasonally
Jet lag(extreme tiredness felt when move from one place to other)
Sleep disorders
Adjusting to a nighttime work schedule
Dementia
.

Risks:
It has following risks however it has a short time effect on body
Eyestrain
Headache
Nausea
Irritability or agitation
Mania, euphoria, hyperactivity or agitation associated with bipolardisorder
People have to take caution when their body become sensitive to daylight your eye when it became sensitive to daylight orwhen you ake antibiotics
Starting the light therapy
By and large, the vast majority start treatment with light treatment in the end of summer, when it normally winds up shady in numerous locales of the nation. Treatment typically proceeds until spring, when open air light alone is adequate to continue a decent state of mind and more elevated amounts of vitality.
On the off chance that you commonly have fall and winter misery, you may see indications amid drawn out times of overcast or stormy climate amid different seasons. You and your specialist can change your light treatment dependent on the planning and length of your side effects.
In the event that you need to attempt light treatment for nonseasonal despondency or another condition, converse with your specialist about how light treatment can be best
During the light therapy
During light therapy sessions, you sit or work near a light box. To be effective, light from the light box must enter your eyes indirectly. You can’t get the same effect merely by exposing your skin to the light.

While your eyes must be open, don’t look directly at the light box, because the bright light can damage your eyes. Be sure to follow your doctor’s recommendations and the manufacturer’s directions.

Light therapy requires time and consistency. You can set your light box on a table or desk in your home or office. That way you can read, use a computer, write, watch TV, talk on the phone or eat while having light therapy. Stick to your therapy schedule and don’t overdo it.

key elements for effectiveness
Light therapy is most effective when you have following things
Intensity. The intensity of the light box is recorded in lux, which is a measure of the amount of light you receive. For SAD, the typical recommendation is to use a 10,000-lux light box at a distance of about 16 to 24 inches (41 to 61 centimeters) from your face.

Duration. With a 10,000-lux light box, light therapy typically involves daily sessions of about 20 to 30 minutes. But a lower-intensity light box, such as 2,500 lux, may require longer sessions. Check the manufacturer’s guidelines and follow your doctor’s instructions. He or she may suggest you start with shorter sessions and gradually increase the time.

Timing. For most people, light therapy is most effective when it’s done early in the morning, after you first wake up. Your doctor can help you determine the light therapy schedule that works best
RESULT
Light therapy may not beable to cure seasonal affective disorder, nonseasonal depression or other conditions. But it may lower the symptoms, increase your energy levels
Light therapy can start to improve symptoms within just a few days. In some cases, though, it can take two or more week