Definitions for "Refraction"
Keywords:  bend, oblique, deflection, medium, ray
The change in the direction of ray of light, heat, or the like, when it enters obliquely a medium of a different density from that through which it has previously moved.
The change in the direction of a ray of light, and, consequently, in the apparent position of a heavenly body from which it emanates, arising from its passage through the earth's atmosphere; -- hence distinguished as atmospheric refraction, or astronomical refraction.
The bending of light as it passes from one medium to another. Light refracts toward the normal when going from a less dense medium into a denser medium and away from the normal when going from a denser medium into a less dense medium.
A test to help determine the best vision correction option for you, whether you are nearsighted, farsighted or have astigmatism.
When the cornea is misshaped and light doesn't focus properly on the retina, the eye has a refractive problem. The three most common refractive errors are: nearsightedness, when you can't see objects far away; farsightedness, when you can't see objects up close; and astigmatism, when you have trouble focusing on any object.
In eye care, the process of measuring a patient's refractive error and the clinical judgment to determine the optical correction needed.
In metallurgy, refraction is a property of metals that indicates their ability to withstand heat. Metals with a high degree of refraction are referred to as refractory. These metals derive their high melting points from their strong intermolecular forces.
The correction which is to be deducted from the apparent altitude of a heavenly body on account of atmospheric refraction, in order to obtain the true altitude.
Keywords:  act
The act of refracting, or the state of being refracted.