(n.) A piece of glass, or other transparent substance, ground with two opposite regular surfaces, either both curved, or one curved and the other plane, and commonly used, either singly or combined, in optical instruments, for changing the direction of rays of light, and thus magnifying objects, or otherwise modifying vision. In practice, the curved surfaces are usually spherical, though rarely cylindrical, or of some other figure.
Example Sentences:
(1) These results demonstrate that increased availability of galactose, a high-affinity substrate for the enzyme, leads to increased aldose reductase messenger RNA, which suggests a role for aldose reductase in sugar metabolism in the lens.
(2) Based on several previous studies, which demonstrated that sorbitol accumulation in human red blood cells (RBCs) was a function of ambient glucose concentrations, either in vitro or in vivo, our investigations were conducted to determine if RBC sorbitol accumulation would correlate with sorbitol accumulation in lens and nerve tissue of diabetic rats; the effect of sorbinil in reducing sorbitol levels in lens and nerve tissue of diabetic rats would be reflected by changes in RBC sorbitol; and sorbinil would reduce RBC sorbitol in diabetic man.
(3) The significance of the differences in these two patterns of actin is discussed in terms of differences in the accommodative ability and static lens shape in these two animals.
(4) The epithelium of Brunner's gland stained intensely with Ricinus communis agglutinin-I (RCA-I), succinylated-WGA (S-WGA) and wheat-germ agglutinin (WGA), moderately with Bandeirea simplicifolia agglutinin-I (BS-I), Concanavalia ensiformis agglutinin (Con A) peanut agglutinin (PNA) and Ulex europaeus agglutinin-I (UEA-I) and occasionally with Dolichos biflorus agglutinin (DBA), Lens culinaris agglutinin (LCA) and soybean agglutinin (SBA).
(5) That is, he believes, to look at massively difficult, interlocking problems through too narrow a lens.
(6) The advantages of the incision through the pars plana ciliaris are (1) easier approach to the vitreous cavity, (2) preservation of the crystalline lens and an intact iris, and (3) circumvention of the corneal and chamber angle complications sometimes associated with the transcorneal approach.
(7) The third patient was using an extended-wear soft contact lens for correction of residual myopia.
(8) The cellularity depends on the type of the lens and the material of the lens and on the clinical picture of the disease.
(9) Although lens haemagglutinins were detected in 6 out of 7 rabbits, in only 3 of the 6 animals did the titre reach a maximum of 1:640.
(10) 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.
(11) We propose that a channel with these properties could contribute to maintenance of lens transparency and fluid balance.
(12) Although the lens did not alter stereopsis, it did produce severe color discrimination losses for normal and dichromatic subjects.
(13) The general efficacy of this intraocular lens compared with other anterior chamber lenses was not addressed in this study.
(14) However, the monkey lens low molecular weight proteins differ from the human low molecular weight proteins in charge as well as molecular weight determined by SDS-PAGE.
(15) Fifty-five myopic naval personnel with no previous contact lens experience were put through a three-week study using these contact lenses.
(16) A Stryker turning frame was used during surgical removal of a posterior displaced lens.
(17) The biocompatibility and fixation of a new silicone intraocular lens was evaluated in the cat eye.
(18) Both organisms have previously been found to be sequestered in the posterior lens capsule by histological and microbiological examination of excised capsular specimens.
(19) Previous experiments had demonstrated that the receptors for the lectins soybean agglutinin (SBA), wheat germ agglutinin, concanavalin A and Lens culinaris agglutinin all were relatively uniformly distributed on both myoblasts and myotubes, and that SBA receptors were capable of rapid redistribution on myotubes but not myoblasts at 4 degrees C (Sawyer & Akeson, 1983).
(20) The relative permittivity and conductivity of rabbit eye lens were measured in the frequency domain between 2 and 18 GHz at temperatures of 37 and 20 degrees C. An analysis of the data suggested that a significant proportion of the bulk water in nuclear and cortical lens tissue may behave differently to pure water.
Lentiform
Definition:
(a.) Lenticular.
Example Sentences:
(1) The PET studies suggest dysfunction of the prefrontal cortex as a result of damage to the lentiform nuclei.
(2) This electrophysiological study analyzes the influence of the nucleus of the basal optic root (nBOR) of the avian accessory optic system on units within the lentiform nucleus (LM), which is the avian equivalent of the pretectal nucleus of the optic tract.
(3) Caudate atrophy was seen less commonly, and nonspecific focal and symmetric signal abnormalities from the caudate or lentiform nuclei were seen by magnetic resonance imaging in 3 out of 4 cases.
(4) Another case of obsessive behaviour as the consequence of lentiform nuclei lesions is reported.
(5) Phase-encoding artifacts at the level of the sylvian fissures caused increased noise, obscuring the brain iron in the lentiform nuclei with the TE of 120 msec.
(6) T1-weighted images revealed a slight symmetric hypointensity in the lentiform nuclei and thalamus.
(7) There was nerve cell loss and gliosis in the thalamus, lentiform nucleus, subthalamic nucleus, red nucleus, midbrain tegmentum, substantia nigra and locus coeruleus.
(8) Dystrophic calcification was present in the corticomedullary junction, lentiform nucleus of the basal ganglia, corticomedullary junction, and dentate nucleus of the cerebellum.
(9) Obscuration of the lentiform nucleus was thought to be an important early sign of cerebral infarction, including the lentiform nucleus.
(10) Microdialysis probes were acutely implanted through indwelling cannulae positioned at several sites above the lentiform nuclei in the conscious primates, and the basal and potassium (100 mM) evoked amino acid levels were monitored for 3 h. These procedures were repeated at fresh sites within the lateral globus pallidus following the induction of parkinsonism with MPTP.
(11) One patient with AIDS, examined with CT only, had low density in the lentiform nucleus.
(12) Magnetic resonance also demonstrated signal aberrations in the lentiform nuclei and surrounding white matter consistent with iron storage or disordered myelination.
(13) The severity of chorea correlated significantly only with lentiform nucleus rCMRGlc.
(14) Three pretectal groups (the lentiform thalamic nucleus, the lentiform mesencephalic-pretectal complex and the geniculate pretectal nucleus) give rise to heavy, bilateral tectal projections.
(15) MRI of both cases demonstrated lesions with prolonged T1, prolonged T2 and partially shortened T2 in bilateral lentiform nuclei.
(16) The sharp transition to normal at the lentiform nucleus previously described on CT was present in only one of the four patients, but was observed in a different patient with cerebral lymphoma and no evidence of HSE and is thus concluded to be less specific than previously thought.
(17) in caudate nucleus, lentiform nucleus and upper mid-brain, which showed nerve cell loss in previous pathological studies.
(18) In the second case the lesion involved the subcortical and deep structures with destruction of the lentiform nucleus, anterior part of the internal capsule and part of the head of the caudate nucleus, and the clinical pattern resembled that of Wernicke aphasia.
(19) Erythrocytes develop in suspension from spherical through discoid to lentil-shaped (lentiform) cells, with a single rigorously specified microtubule bundle, the marginal band.
(20) Hematomas are usually spherical or ovoid within the abdomen, and lentiform within the pleural space or abdominal wall.