(n.) To bend sharply and abruptly back; to break off.
(n.) To break the natural course of, as rays of light orr heat, when passing from one transparent medium to another of different density; to cause to deviate from a direct course by an action distinct from reflection; as, a dense medium refrcts the rays of light as they pass into it from a rare medium.
Example Sentences:
(1) In the group of high myopia (over 20 D), the mean correction was 13.4 D. In the group with refraction between 0 and 6 D, 88% of the eyes treated had attained a correction between -1 and +1 D 3 months postoperatively.
(2) The molar refractivity has been shown to be a superior parameter for the description of the activity of sulphonamides than the sum of electronegativities of atoms making up a heterocyclic substituent in the sulphonamide molecule and molecular weight of the substituent.
(3) A new approach is presented to the refractive procedure by adding observation, both surreptitious and direct, as an adjunct, an aid and a supplement to differential diagnosis in a refractive examination and in visual analysis.
(4) Dioptric aniseikonia was calculated between 1 month and 24 months after surgery (with Gruber's and Huber's computer program) on the basis of most recently obtained values (bulb axis length, depth of the anterior chamber, lens thickness, necessary refraction), and compared with subjective measurements taken with the phase difference haploscope.
(5) These versions offer different advantages and are selected according to the particular field of application and the refraction of the surgeon.
(6) The refraction of his mild hyperopic eyes (+0,5 dpt) changed to -5,5 dpt and the intraocular pressure increased to 40 mm Hg in the right and 42 mm Hg in the left eye.
(7) These observations suggest that refractive anomalies such as anisometropia that limit high frequency spatial resolution and binocular integration can present a major obstacle to the postnatal development of binocular vision.
(8) A retrospective study was performed to evaluate the effect of recipient-donor trephine disparity on refractive error and corneal curvature post-suture removal in keratoconus.
(9) Scientists and clinicians concerned with underwater vision have not considered the relationship between chromatic aberration, water color, and the refractive state of the eye.
(10) As the refractive status changes a curve is traced out on the graph.
(11) The change in refractive astigmatism was as high as 1.50DC (diopter cylinder).
(12) There is a problem in this approach if the angle between the direction of tracked beam and the direction of tracking translation is not zero due to refraction or other effects.
(13) We find good agreement between the model calculations and the experimental results indicating that edge birefringence can be attributed to the change in polarization of light that is refracted and reflected by dielectric interfaces.
(14) The corneal sensibility was examined with the aesthesiometer of Draeger in 41 patients after refractive corneal surgery, 31 patients after radial keratotomy, 5 after epikeratophakia, 5 after excimer laser ablation.
(15) Extraordinarily wide angles were observed in all cases and myopia was a common refractive error.
(16) There was no connection between the cholesterol level, refraction or visual acuity.
(17) The refractive changes in 84 children (155 eyes) following horizontal strabismus surgery and in 97 children (181 eyes) without surgical intervention were studied.
(18) Refractive error and the ocular refractive components have heritabilities intermediate between zero and one, as complied from several studies, indicating familial resemblance, but also non-genetic variation.
(19) Approximately 75% of repeat autorefractor measurements were within 0.50 D of the initial readings, and about 75% of measurements were within 1.00 D of the manual refractions.
(20) The refractive index profile in the equatorial plane of bovine lenses from over a wide age range is presented.
Retract
Definition:
(v. t.) To draw back; to draw up or shorten; as, the cat can retract its claws; to retract a muscle.
(v. t.) To withdraw; to recall; to disavow; to recant; to take back; as, to retract an accusation or an assertion.
(v. t.) To take back,, as a grant or favor previously bestowed; to revoke.
(v. i.) To draw back; to draw up; as, muscles retract after amputation.
(v. i.) To take back what has been said; to withdraw a concession or a declaration.
(n.) The pricking of a horse's foot in nailing on a shoe.
Example Sentences:
(1) Brain damage may be followed by a number of dynamic events including reactive synaptogenesis, rerouting of axons to unusual locations and altered axon retraction processes.
(2) Tottenham Hotspur’s £400m redevelopment of White Hart Lane could include a retractable grass pitch as the club explores the possibility of hosting a new NFL franchise.
(3) Any MP who claims this is not statutory regulation is a liar, and should be forced to retract and apologise, or face a million pound fine.
(4) During the first 15 to 20 min of metamorphosis the larval arms are retracted and resorbed into the aboral surface of the juvenile.
(5) • Written, oral and video statements of self-incrimination and self-renunciation by the detainees, apparently induced by the authorities, have been released through official media channels (for example, lawyer Zhang Kai was induced to make such a statement, which he later retracted).
(6) Duane's retraction syndrome is a congenital eye movement disorder characterized by a deficiency of abduction, mild limitation of adduction, with retraction and narrowing of the palpebral fissure on attempted adduction.
(7) Axonal trees display differential growth during development or regeneration; that is, some branches stop growing and often retract while other branches continue to grow and form stable synaptic connections.
(8) She said she was not worried by Rubio’s one-time position on his immigration bill, later retracted, that he could not support reform if it included citizenship for gay couples.
(9) Useful differential morphological criteria can be: star-like or transverse ring-shaped profile of isolated ulcerations, tubular ileocolic junction with retracted cecum and open valve, and uniformity of lesion in the comprehensive picture of the clinical case.
(10) Both require more brain retraction and have greater risk to the facial nerve than the translabyrinthine approach.
(11) Unlike posterior tympanoplasty, this technique makes it possible to meticulously remove the osteitic bone invariably found in the facial recess when there is infection of the retraction pocket.
(12) In the third patient laparotomy was applied owing to the bleeding from the retracted, cut uterine artery.
(13) Because of laboratory and clinical observation that recurrent nerve paralysis retracts the involved vocal cord from the midline, it was proposed that deliberate section of the recurrent nerve would improve the vocal quality of patients with spastic dysphonia.
(14) Seven to 30 days following axotomy the volume of the hypoglossal nucleus was significantly diminished, undoubtedly reflecting dendritic retraction (P less than 0.05).
(15) Contacts resulting in collapse and retraction were often accompanied by a rapid and transient burst of lamellipodial activity along the neurite 30-50 microns proximal to the retracting growth cone.
(16) At three, six, and twelve months after the first operation the development of retraction pockets was also studied.
(17) The anchoring wire can also be retracted and repositioned.
(18) The right occipital lobe is retracted laterally from the falx cerebri.
(19) These experiments demonstrated that accessory abducens is a primary controller of eye retraction through its axons to retractor bulbi.
(20) A commercial system for producing retracted compensators has been adapted to suit local needs, and is evaluated here.