What's the difference between optical and refractometer?
Optical
Definition:
(a.) Of or pertaining to vision or sight.
(a.) Of or pertaining to the eye; ocular; as, the optic nerves (the first pair of cranial nerves) which are distributed to the retina. See Illust. of Brain, and Eye.
(a.) Relating to the science of optics; as, optical works.
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.
Refractometer
Definition:
(n.) A contrivance for exhibiting and measuring the refraction of light.
Example Sentences:
(1) Accordingly, this new refractometer for the TWEL proved to be sensitive, dependable and also inexpensive.
(2) Results were also compared to conventional "objective" refractometry by means of a hand refractometer (Rodenstock PR 50).
(3) The purpose of this study is to determine the capacity of the kidneys of the newborn surgical patient to dilute and concentrate, and to excrete solute and water; and the accuracy of the refractometer to determine the tonicity of urine.
(4) As a result limits can be established for the subjective acceptability of refraction values with automatic or manual refractometers.
(5) Subunit molecular weights of the (Na+,K+)-ATPase of canine renal outer medulla were estimated in the presence of sodium dodecyl sulfate (SDS) by the measuring system consisted of components connected in the following sequence: a TSK-gel G3000 SW column, a UV spectrophotometer, a low-angle laser light scattering photometer, and a differential refractometer.
(6) In addition this method excludes the accommodation of the patient as apposed to regular refractometers.
(7) Refractometer readings were compared with total protein levels and with gamma-globulin levels, determined by the ZSTT, to assess the validity of the technique.
(8) The Auto Refractometer recordings for all the different refractive components were observed to skew towards more minus in the high myopic eyes but more plus in the high hypermetropes.
(9) Triacylglycerols (TGs) from an african peanut oil were analysed and fractionated by reversed-phase liquid chromatography (RPLC) using a differential refractometer as a detector.
(10) Predicted ovulation was the same day in 86% of the ovulatory cycles predicted by creatinine and refractometer corrected estradiol levels.
(11) Purification of glutaraldehyde is provided by vacuum distillation with a rotational-filmy evaporator, and its concentration is determined using refractometer.
(12) The paper concludes with an appendix in which the features of three commercially available automatic refractometers are compared.
(13) Changes in refraction were measured with a Rodenstock refractometer which has an exit pupil of 3 mm, and nine narrow band interference filters.
(14) The refractometer was also compared with an osmometer.
(15) In the other 45% a direct comparison of the reflective and the subjective refraction values shows which component (sphere, cylinder) of the refractometer correction value leads to a lower visual acuity.
(16) This allowed exposure of the refractometer mark for a short duration and thus eliminated the accommodation stimulus.
(17) The manifest (dry) and cycloplegic refractions of 50 eyes of 25 patients aged 8 to 28 years were studied on the Nikon Auto Refractometer NR-1000F (AR) and compared with the results of clinical refraction (CR) under homatropine and the final clinical acceptance on postmydriatic testing.
(18) A semi-automatic system incorporating an ultra-sensitive interference refractometer coupled to a dual-column gel permeation apparatus has been devised for measurement of the molecular size distribution of dextrans in small samples of serum and urine.
(19) Refractometer readings of neonatal lamb sera were found to be closely correlated to their ZSTT readings (r = 0.89).
(20) An experiment was designed to evaluate the optical refractometer, a relatively simple and inexpensive piece of equipment which measures the refractive index of a serum sample and thus provides an estimate of its total protein content.