(n.) The transparent part of the coat of the eyeball which covers the iris and pupil and admits light to the interior. See Eye.
Example Sentences:
(1) Displacement of the surface of the cornea of bovine eyes after disruption of intact structures was investigated by means of holographic interferometry.
(2) The patient, a 12 year-old boy, showed a soft white yellowish mycotic excrescence with clear borders which had followed the introduction of a small piece of straw into the cornea.
(3) Increased amounts of laminin in the basal epithelium of the cornea and of collagen type III in the stroma and subepithelial components of the stroma were observed.
(4) We report on a membrane inflation method of wound spreading in intact human corneas using the Baribeau Micronscope.
(5) When 5 corneas with quiescent HSK were cultured in vitro, 3 again became HSV antigen positive.
(6) Corneas of bullfrog (Rana catesbeiana) were mounted between lucite chambers.
(7) The eye is of the closed vesicle type and is composed of retina, cornea, vitreous body, lens and optic nerve.
(8) The steps in the model are the drug elimination rate in the precornea and anterior chamber, the rate of drug dissolution, the rate of drug penetration into the cornea, and the rate of drug transport into the aqueous humor.
(9) Gas trapping and corneal edema were not observed in uncovered corneas or corneas covered with membrane lenses.
(10) Since lymphocytic cells in intimate contact with degenerating keratocytes have previously been identified in the cornea, these observations provide a basis for the view that cell-mediated immunopathogenesis is involved in the etiology of herpetic stromal keratitis.
(11) Lactate dehydrogenase (LDH) levels and subunit isozyme patterns in cornea were monitored in 36 albino rabbits wearing thick, rigid, gas-permeable contact lenses for periods of 24 h, 2 and 7 days, and 1 and 3 months.
(12) Calculations of energies of activation, taken from Arrhenius plots, indicate that the diffusion of drug across the cornea may be by two different mechanisms that depend on the physical-chemical characteristics of the perfusant.
(13) The mean in the newborn-to-6-month-old group was 47.59 D; in the 12-18-month-old group it had decreased to 45.56 D. The cornea appears to stabilize at about 54 months, with an average reading of 42.69 D. Evaluation of 11 eyes diagnosed as having persistent hyperplastic primary vitreous revealed that eyes with this diagnosis generally have steeper corneas than normal eyes at any given age.
(14) There was no significant difference in the wound-healing rate, but at 36 hours there was a reduction in wound-healing rate of the excimer ablated corneas.
(15) More importantly, this study reports the first detection of LAT in RNA extracted from 9% of corneas from latently infected rabbits (n = 22) by the polymerase chain reaction.
(16) Cat corneas were stored at refrigerator temperatures in M-K medium (TC-199, 5% dextran), modified M-K medium (TC-199, 1% chondroitin sulfate), or on the intact globe in moist chambers for intervals of one to nine days.
(17) Pterygia, triangular sheets of fibrovascular tissue that invade the cornea, have recurrence rates of 30% to 50% with currently available surgical procedures.
(18) Rabbit corneas grown in organ culture (24 well plate) were inoculated topically with 50 microliters (5 x 10(5) pfu) of different ocular adenoviral serotypes (ATCC and clinical isolates).
(19) A recipient cornea gradually developed wrinkling and opacification in Bowman's layer following an uneventful myopic epikeratoplasty.
(20) In neurological diseases the hyposensitivity could include the cornea, conjunctiva and lid margin.
Limbus
Definition:
(n.) An extramundane region where certain classes of souls were supposed to await the judgment.
(n.) Hence: Any real or imaginary place of restraint or confinement; a prison; as, to put a man in limbo.
(n.) A border or margin; as, the limbus of the cornea.
Example Sentences:
(1) Eye movements of convergence and divergence were recorded by a limbus tracker.
(2) The oblique interface between corneal and scleral stroma determines the appearance of the surgical limbus whose landmarks vary around the circumference of the globe but predictably correlate with structures of the anterior chamber angle.
(3) Bimedial rectus recession with measurement from the limbus was combined with conjuctival recession 85 children undergoing surgery for esotropia.
(4) The binding sites were mainly located on the stereocilia, the cuticular plate of hair cells, the head plates of Deiters' cells, fibrous structures in pillar cells, in the spiral limbus and tectorial membrane and basilar membrane, plasma membranes, mitochondria and the chromatin of various kinds of cells.
(5) Fibrocytes in the lateral wall and limbus of the gerbil cochlea evidenced a capacity for ion transport activity by immunostaining for transport mediating enzymes including Na,K-ATPase, carbonic anhydrase (CA) and creatine kinase (CK).
(6) In Stage III a thoroughgoing keratectomy parallel to the limbus was performed, in combination with cataract extraction and coreplasty.
(7) The authors investigated two cryostimulation regimes: working temperature -70 degrees C, 10 points for 7 seconds on the borderline of the corroded area of the cornea, and working temperature of -160 degrees C, 10 points and four seconds on the limbus of the cornea.
(8) Under normal circumstances, the limbus would, therefore, seem to be more important as a zone that restricts flow and diffusion rather than an area of active molecular movement.
(9) After dissection of a muscle the distance from the posterior limbus (gray-white line) to the insertion line of the muscle was measured with calipers both at the midpoint and at each end of the insertion.
(10) Six additional eyes were then subjected to an equivalent treatment (50 degrees C in five 1-minute applications), which resulted in approximately 180 degrees of heat treatment just posterior to the corneoscleral limbus.
(11) A 21-year-old white woman had an apparently benign fibrous histiocytoma at the corneoscleral limbus.
(12) The evidence from this study suggests that the mechanisms for corneal pannus formation from the limbus are quite different from those for scarring of the conjunctiva.
(13) When possible the removal of the foreign body was carried out in the quadrant closet to where the foreign body was located and through a site 4-5 mm from the limbus.
(14) The calculation has shown that the rounding of one of the angles of interference rhombus and its displacement towards the centre of the picture speak about either a functional deficiency of a muscle inserted into the eye ball in this place or about displacement of the point of its insertion from the limbus along the meridian of its action; displacement of one the angles of interference rhombus from the meridian speaks about displacement of the point of efforts exertion of the corresponding muscle into the same direction.
(15) The authors describe the technique of arthrography of the hip and the aspect of the limbus in the normal hip as well as in subluxation and different types of dislocation.
(16) The histopathology of tumours originating at the corneoscleral limbus is reviewed with special reference to some 636 specimens examined over a 40 year period at the Institute of Ophthalmology, London.
(17) Recently he executes a modified scleral incision cutting off the conjunctiva from the corneal limbus; he considers it convenient and safe.
(18) The opacity lay in the superficial cornea about 1 to 3 mm from the corneoscleral limbus and had fine spokes extending away from the main trunk.
(19) More retinal holes, particularly large horseshoe breaks, can be closed effectively with radially oriented buckles than with limbus parallel ones; limbus parallel buckles often were complicated by "fish-mouthing" of the breaks and leaking radial folds.
(20) The staining intensity was greatest in the central cornea, becoming weaker toward the corneal scleral limbus, and was very weak or absent in the conjunctival epithelium.