| refract | 1. To change the direction of a ray of light. 2. To detect an error of refraction and to correct it by means of lenses. Origin: L. Refringo, pp. -fractus, to break up (05 Mar 2000) |
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| refractable | Subject to refraction. Synonym: refrangible. (05 Mar 2000) |
| refracted | 1. <botany> Bent backward angularly, as if half-broken; as, a refracted stem or leaf. 2. Turned from a direct course by refraction; as, refracted rays of light. Source: Websters Dictionary (01 Mar 1998) |
| refracted light | Bent rays of light changed in passage from one transparent medium to another of unequal density. See: refraction. (05 Mar 2000) |
| refractile | <cell biology> Adjective usually used in describing granules within cells that scatter (refract) light. Not to be confused with refractory. (18 Nov 1997) |
| refracting | Serving or tending to refract; as, a refracting medium. <optics> Refracting angle of a prism See Telescope. Source: Websters Dictionary (01 Mar 1998) |
| refracting angle of a prism | The angle between two plane surfaces of a prism. Synonym: refracting angle of a prism. (05 Mar 2000) |
| refraction | <physics> Bending of waves as they pass from a medium having one refractive index to a medium (or region within a medium) having a different refractive index. (09 Oct 1997) |
| refraction, angle of | <microscopy> The acute angle between the normal to a refracting surface at the point of incidence, and the refracted ray. (05 Aug 1998) |
| refraction, ocular | Refraction of light effected by the media of the eye. It also includes the determination of the refractive state and refractive correction. (12 Dec 1998) |
| refractionist | A person trained to measure the refraction of the eye and to determine the proper corrective lenses. (05 Mar 2000) |
| refractionometer | <optics> A contrivance for exhibiting and measuring the refraction of light. Origin: Refraction. Source: Websters Dictionary (01 Mar 1998) |
| refractive | Serving or having power to refract, or turn from a direct course; pertaining to refraction; as, refractive surfaces; refractive powers. Refractive index. <medicine> The ratio of the sine of the angle of incidence to the sine of the angle of refraction for a ray passing out of one of the media into the other. Origin: Cf. F. Refractif. See Refract. Source: Websters Dictionary (01 Mar 1998) |
| refractive accommodative esotropia | That type of esotropia eliminated by correction of hypermetropic refractive error. (05 Mar 2000) |
| refractive amblyopia | A suppression of central vision due to an unequal refractive error (anisometropia) of at least two diopters. This induces a sufficient difference in image size (aniseikonia) that the two images cannot be fused. In order to avoid confusion, the blurrier image is suppressed. Synonym: refractive amblyopia. (05 Mar 2000) |