(n.) That branch of physical science which treats of the nature and properties of light, the laws of its modification by opaque and transparent bodies, and the phenomena of vision.
Example Sentences:
(1) Following central retinal artery ligation, infarction of the retinal ganglion cells was reflected by a 97 per cent reduction in the radioactively labeled protein within the optic nerve.
(2) This study examined both the effect of variations in optical fiber tip and in light wavelength on laser-induced hyperthermia in rat brain.
(3) The number of axons displaying peptide-like immunoreactivity within the optic nerve, retinal or cerebral to the crush, and within the optic chiasm gradually decreased after 2-3 months.
(4) Once the normal variations are mastered, appreciation of retinal, choroidal, optic nerve, and vitreal abnormalities is possible.
(5) Chromatolysis and swelling of the cell bodies of cut axons are more prolonged than after optic nerve section and resolve in more central regions of retina first.
(6) CW Nd:YAG light transmitted by fiber optic cable and sapphire crystal was applied transsclerally to the ciliary body of pigmented and albino rabbits.
(7) Unlike results seen in the goldfish optic nerve, injury to the rat optic nerve induced no observable increase in laminin content or change in its distribution.
(8) This is the first report of anterior ischemic optic neuropathy as a result of hemodialysis-associated hypotension.
(9) It is shown that, by comparison of a reacting mixture at chemical equilibrium with a non-reacting but equally composed one, the sum of the mean concentrations of the reaction products can immediately be taken from optical absorption or from interferometric measurements.
(10) A television camera scans the spread through microscope optics; computer and special purpose electronics process the video signals to generate run length histograms.
(11) The purity and configuration of each isomer of the free acid and N-chloroacetylated derivative were ascertained by: (a) paper chromatography in five solvent systems, (b) elemental analysis, (c) Van Slyke nitrous acid determination of alpha-carbonyl carbon, and (d) Van Slyke ninhydrin determination of alpha-carbonyl carbon, and (e) optical rotation.
(12) The optical and oxygen binding properties of the reconstituted myoglobins containing two isomeric monoformyl-monovinylhemins were found to be different.
(13) These images were previously determined by using a recently developed hybrid optical-digital method.
(14) The development of optical fibers capable of transmitting laser energy has encouraged the experimental use of laser irradiation for the treatment of acquired cardiovascular disorders.
(15) This technique is sensitive to the optical anisotropy within the muscle, including that due to intrinsic properties of the protein molecules as well as that due to the regular arrangement of proteins in the surrounding medium.
(16) Patients should be evaluated by perimetry using an appropriate strategy and contrast sensitivity testing, along with careful examination of the optic discs.
(17) Thus, during treatment with ethambutol visually (pattern) evoked potentials may reveal a surprisingly high percentage of subclinical optic neuritis.
(18) The optical efficiencies are similar and depend on the match of the excitation characteristics of the stain with the emission spectra of the light source.
(19) Morphological results demonstrated that 30 Gy irradiated animals showed extensive necrosis primarily in the fimbria, which extended into the internal capsule, optic nerve, hippocampus, and thalamus.
(20) A compact attachment for microscope-type instruments is described enabling to introduce, rapidly and qualitatively, minute biological speciments into melted embedding medium and ensuring the safety of optics.
Vision
Definition:
(v.) The act of seeing external objects; actual sight.
(v.) The faculty of seeing; sight; one of the five senses, by which colors and the physical qualities of external objects are appreciated as a result of the stimulating action of light on the sensitive retina, an expansion of the optic nerve.
(v.) That which is seen; an object of sight.
(v.) Especially, that which is seen otherwise than by the ordinary sight, or the rational eye; a supernatural, prophetic, or imaginary sight; an apparition; a phantom; a specter; as, the visions of Isaiah.
(v.) Hence, something unreal or imaginary; a creation of fancy.
(v. t.) To see in a vision; to dream.
Example Sentences:
(1) Clinical signs of disease developed as early as 15 days after transition to the experimental diets and included impaired vision, decreased response to external stimuli, and abnormal gait.
(2) A total of 104 evaluable patients 20-90 years old treated by direct vision internal urethrotomy a.m. Sachse for urethral strictures reported retrospectively via a questionnaire their sexual potency before and after internal urethrotomy.
(3) In the present study, 125 oesophageal biopsies obtained under direct vision at endoscopy from 22 patients with Barrett's oesophagus were systematically studied using fluorescence and peroxidase antiperoxidase single and double-staining immunocytochemical methods employing highly specific antibodies to localize the following peptide-containing cell types in Barrett's mucosa: gastrin, somatostatin, gastric inhibitory polypeptide, motilin, neurotensin and pancreatic glucagon.
(4) At this threshold there was no effect on reducing the rate of visual acuity overreferrals, but ten children with abnormal binocular vision were detected who were not referred by visual acuity criteria.
(5) DATA Modern football data analysis has its origins in a video-based system that used computer vision algorithms to automatically track players.
(6) Case 3 was that of a 70-year-old female with left impaired vision and frontal headache.
(7) While the correlations between speed and accuracy reversed over time, the abnormal vision group began and ended at the most extreme levels, having undergone a significantly more radical shift in this regard.
(8) Adaptation at 10 deg eccentricity yielded slightly higher threshold elevations than for central vision.
(9) The ceremony is the much-anticipated shop window for the Games, and Boyle was brought in to provide the creative vision.
(10) Acini in the parotid gland of the North American mink (Mustela vision) are composed of seromucous cells that contain secretory granules of peculiar morphology.
(11) Drones and helicopter strikes are not equipped with political night-vision.
(12) It is the combination of his company's pan-African and industrialist vision – reminiscent of the aspirations of African independence pioneers like Ghana's Kwame Nkrumah – and its relentless financial growth that has set Dangote apart.
(13) A 40 year old female presented with secondary glaucoma and loss of vision due to anterior pole metastasis of breast carcinoma.
(14) We present a patient with unilateral progressive painless loss of vision leading to optic atrophy and blindness.
(15) Proposed guidelines for future research include the use of conceptual rather than operational definitions of visual spatial ability, greater attention directed at separating spatial from nonspatial task components, and studies examining basic mechanisms underlying spatial vision.
(16) Repeated replacements of keratoprostheses extruded or removed because of complications were possible with restoration of the vision obtained after the first implantation.
(17) Whatever else Scott is about, Waverley ends with a vision of Britishness and a British union.
(18) The external and internal rear-view mirrors of automobiles should be positioned within the binocular field of vision.
(19) We address this issue directly over a 5-log10-unit range of light levels covering scotopic, mesopic, and photopic vision.
(20) Ocular disorders had been found in 62% of the cases, commonly represented by blindness of one eye, decreased vision, papillar edema and eventually by occlusion of the retineal artery.