| refractive accommodative esotropia | That type of esotropia eliminated by correction of hypermetropic refractive error. (05 Mar 2000) |
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| nonrefractive accommodative esotropia | That type of esotropia in which an abnormality of the accommodative-convergence mechanism is not eliminated by correction of refractive error. (05 Mar 2000) |
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| accommodative | Relating to accommodation. (05 Mar 2000) |
| accommodative asthenopia | Asthenopia due to errors of refraction and excessive contraction of the ciliary muscle. (05 Mar 2000) |
| accommodative convergence | The meter angle of convergence expressed in diopters; equal to the product of the meter angles of convergence times the interpupillary distance measured in centimeters. (05 Mar 2000) |
| accommodative convergence-accommodation ratio | The amount of convergence (measured in prism diopters of convergence) divided by the amount of accommodation (measured in diopters) required to direct both eyes upon an object. (05 Mar 2000) |
| accommodative strabismus | Strabismus in which the severity of deviation varies with accommodation. (05 Mar 2000) |
| 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 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) |
| refractive errors | Deviations from the average or standard indices of refraction of the eye through its dioptric or refractive apparatus. (12 Dec 1998) |
| refractive index | <microscopy> The ratio of the velocity of light in a vacuum to the velocity in some medium. Refractive index generally increases with the atomic number of the constituent atoms. (05 Aug 1998) |
| refractive keratoplasty | Any procedure in which the shape of the cornea is modified, with the intent of changing the refractive error of the eye; for example, if the cornea is flattened, the eye becomes less myopic. See: photorefractive keratectomy, keratophakia, lamellar keratoplasty, thermokeratoplasty, keratomileusis, radial keratotomy. Synonym: keratorefractive surgery. (05 Mar 2000) |
| refractive keratotomy | Modification of corneal curvature by means of corneal incisions to minimise hyperopia, myopia, or astigmatism.In this type of radial keratotomy surgery, performed by excimer laser, pie-shaped pieces of cornea are removed under local anaesthetic. The resulting scar tissue formation reshapes the cornea. This class of surgery is somewhat unpredictable, and its long-term effects are still unknown. (05 Mar 2000) |
| A-esotropia | Convergent strabismus greater in upward than in downward gaze. (05 Mar 2000) |
| basic esotropia | That type of esotropia not influenced by correction of refractive error. Synonym: basic esotropia. (05 Mar 2000) |
| V-esotropia | Convergent strabismus greater in downward than in upward gaze. (05 Mar 2000) |