การใช้แสงไฟที่มีสีสัน เป็นอีกทางเลือกในการบำบัดอาการป่วย ปัจจุบันแพทย์ได้ใช้สีของแสงบำบัดอาการป่วย ตั้งแต่อาการหน้าแดง Rosacea ไปจึงถึง อาการปวดหลัง
ยกตัวอย่างเช่น คลื่นแสงสีแดง มีผลเจาะลึกเข้าไปในเนื้อเยื่อและสามารถช่วยสมานแผล
Insomnia? Back pain? Try a blast of coloured light
By ROGER DOBSON
PUBLISHED: 02:40 GMT, 8 January 2013
Using coloured light to treat illness sounds very ‘alternative’ — but doctors are now offering colour therapy for conditions ranging from rosacea to back pain.
Researchers have discovered that different wavelengths of light (i.e. different colours) can provide different health benefits.
Red light, for example, can penetrate deep into tissue and can help with wound healing.
‘In the past, light treatments were not so discriminating, which was a problem, as some wavelengths are associated with the development of skin cancer,’ says Dr Bav Shergill, of the British Association of Dermatologists.
‘Now we have light that has specific wavelengths, which is making this non-invasive treatment even more attractive.’
There are a number of ways coloured light therapy can be given — via lasers, lamps, and LEDs (light-emitting diodes).
Here, we reveal how a rainbow of light is being harnessed to treat common health problems.
TREATS: Back pain, stomach ulcers, gum disease, acne
Researchers at Heidelberg University in Germany are using blue light therapy to treat back pain in a trial of a patch-like device containing LEDs.
The theory is that the blue light stimulates the production of nitric oxide, a natural compound with pain killing and anti-inﬂammatory effects.
Blue light is increasingly used as an antibacterial treatment.
At Massachusetts General Hospital, doctors have found that shining blue light into the stomachs of patients with Helicobacter pylori (a bacterium linked to ulcers) reduces the bacterium by up to 99 per cent.
It is thought blue light kills the bacterium cells without harming healthy tissue.
Meanwhile, a Japanese study found blue light was significantly more effective than other colours at zapping bacteria involved in gum disease.
Blue light therapy is also effective for acne.
Research at the University of Missouri suggests improvement can be seen within a week, and after two months, more than 90 per cent of patients had visible improvements.
‘It can be used to treat patients who are unable to tolerate conventional acne treatments,’ says Dr Shergill.
TREATS: Sun damage, burns, hair loss
Dermatologists in Jerusalem are using red light to treat actinic keratosis (or solar keratosis).
This is a pre-malignant skin condition where thick, scaly or crusty patches develop on the skin — the risk of it increases with age.
In one study at Hadassah-Hebrew University Medical School, all 15 patients treated with light improved after one session.
It is thought red light may tackle inflammation caused by the abnormal tissue, or activates the immune system to attack the abnormal cells.
Red light speeds up the healing of burns, too, according to a study at Shanghai Jiaotong University.
Patients given daily treatment recovered two days faster than those not given light therapy. (Patients were treated for 30 minutes at a time.)
The light appears to increase blood circulation, boosting the supply of oxygen and nutrients needed to heal tissue.
It is also thought to stimulate the production of collagen, a key component of wound healing.
Red light is also being tested for treating hair loss in women.
TREATS: Sleep and balance problems
Exposure to different coloured lights may help older people with balance problems and insomnia.
As part of a study at Stanford University in the U.S., older people will be exposed to orange light for 30 minutes a night.
One theory is that orange light has an effect on the balance mechanism in the inner ear.
TREATS: Spider veins, birthmarks, rosacea, sunburn
Haemoglobin, which gives blood its red colour, soaks up yellow light, which then destroys spider veins.
With port wine stains and birthmarks, the yellow light is absorbed by haemoglobin within the birthmark.
‘This treatment has improved patients’ lives immeasurably,’ says Dr Shergill. Yellow light also reduces the appearance of redness, swelling and inflammation, and may help rosacea and sunburn.
TREATS: Enlarged prostate, wound healing, depression, insomnia
Green laser light is being used as an alternative to the scalpel in surgery for benign prostate disease (or BPH).
It vaporises and removes enlarged prostate tissue. The laser light is administered by a fibre optic inserted into the urethra.
According to a report from the University of California at Los Angeles, it produces results that are equal to those with surgery, but without the severe side-effects and risks.
‘Green laser lights can be very useful in patients on blood thinners, as it is not necessary to stop taking these drugs in order to have the operation,’ says Anthony Koupparis, consultant urological surgeon at Southmead Hospital, Bristol.
Green lasers have also been shown to melt body fat, and are being tested in a trial for body contouring, or reshaping, after weight loss.
Meanwhile, scientists at Osaka University in Japan have discovered LEDs that emit green light can speed up wound healing in tests on animals.
It is thought the light boosts production of compounds involved in wound healing.
Green lasers could help with seasonal depression and insomnia, too.
One theory is malfunctions in the body’s natural clock contribute to both conditions, as it coordinates the release of hormones such as melatonin, crucial for deep sleep, and serotonin, a feel-good chemical.
In a trial at the University of California, a light worn at night bathes the face in green light. Scientists believe this will reset the body clock.
TREATS: Itching, alopecia, eczema, vitiligo psoriasis
Ultraviolet light therapy is an effective treatment for many skin conditions, including psoriasis and eczema, possibly by slowing down cell growth and inflammation.
Controlled use of UV light has also been shown to help reduce the size of the white patches of vitiligo, a skin pigment disorder.
In a trial at Nottingham University, doctors are comparing the effects of hand-held UVB and placebo devices on