DR, Dr, dr, may refer to:
- Doctor (title), a person who has obtained a doctoral degree, or a courtesy title for a medical or dental practitioner
- The Dominican Republic, a country in the Caribbean Sea
A device is usually a constructed tool. Device may also refer to:
Light, visible light, or visible radiation is electromagnetic radiation that can be perceived by the human eye. Visible light spans the visible spectrum and is usually defined as having wavelengths in the range of 400–700 nanometres (nm), corresponding to frequencies of 750–420 terahertz. The visible band sits adjacent to the infrared (with longer wavelengths and lower frequencies) and the ultraviolet (with shorter wavelengths and higher frequencies), called collectively optical radiation.
In physics, the term "light" may refer more broadly to electromagnetic radiation of any wavelength, whether visible or not. In this sense, gamma rays, X-rays, microwaves and radio waves are also light. The primary properties of light are intensity, propagation direction, frequency or wavelength spectrum, and polarization. Its speed in vacuum, 299792458 m/s, is one of the fundamental constants of nature. All electromagnetic radiation exhibits some properties of both particles and waves. Single, massless elementary particles, or quanta, of light called photons can be detected with specialized equipment; phenomena like interference are described by waves. Most everyday interactions with light can be understood using geometrical optics; quantum optics, is an important research area in modern physics.
The main source of natural light on Earth is the Sun. Historically, another important source of light for humans has been fire, from ancient campfires to modern kerosene lamps. With the development of electric lights and power systems, electric lighting has effectively replaced firelight.
Pro is an abbreviation meaning "professional".
Pro, PRO or variants thereof might also refer to:
A therapy or medical treatment is the attempted remediation of a health problem, usually following a medical diagnosis. Both words, treatment and therapy, are often abbreviated tx, Tx, or Tx.
As a rule, each therapy has indications and contraindications. There are many different types of therapy. Not all therapies are effective. Many therapies can produce unwanted adverse effects.
Treatment and therapy are often synonymous, especially in the usage of health professionals. However, in the context of mental health, the term therapy may refer specifically to psychotherapy.
by Blondie
I never write reviews, but this mask truly changed my life because I no longer suffer with hormonal acne. My skin has significantly cleared up since using this product! I tried everything to get rid of the acne I was developing and this was the only thing that actually worked!
by Tard
I have previously had success with blue light in preventing occasional (not severe but annoying) cystic acne but I wanted something that would cover my whole face and that i could use preventatively vs reactively once I already had a pimple. My skin has been almost perfect since I started using this daily between February to early May. I went on a two week vacation (and didn’t bring the mask) but the benefits continued and I didn’t have any breakouts during my trip. I already use Retin A and other acne treatments and I have not identified any dietary connection to my acne so this really is the differentiator. Yes it is expensive and no i can’t speak to the longevity but when you think of how much money you spend on treatments that don’t work and consider Nordstrom’s return policy, this is definitely worth trying. The anti aging is just a bonus!!
by Maria
It take time to see the changes. Give them at least 2 months and every night.