(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.
Nebula
Definition:
(n.) A faint, cloudlike, self-luminous mass of matter situated beyond the solar system among the stars. True nebulae are gaseous; but very distant star clusters often appear like them in the telescope.
(n.) A white spot or a slight opacity of the cornea.
(n.) A cloudy appearance in the urine.
Example Sentences:
(1) Nor is there much sign of Thanos, the studio's go-to background baddie, though his minion Nebula turns up in the form of Doctor Who's shaven-headed Karen Gillan.
(2) However, exposure to infection may result in temporary conjunctival inflammation and more persistant stromal nebulae.
(3) It won the prestigious Nebula and Hugo awards, and was added to the official reading list of the US marines .
(4) These nebulae do not flatten when contact lens wear is discontinued.
(5) Cercariae remaining in the cornea became the centres of stromal nebulae 0.1-0.2 mm across which remained visible for at least 3 months.
(6) "In one billion years, the sun will begin its red giant stage, increasing terrestrial temperatures above 1,000 degrees, boiling off our atmosphere, eventually forming a planetary nebula, making Earth inhospitable to life," he wrote.
(7) But the community morphed into a nebula for antisocial crime, poverty and discontent; blighted by asbestos, death, joblessness and cyclical deprivation.
(8) We describe a simple technique of superficial keratectomy to remove proud nebulae in which the resulting defect healed quickly under a therapeutic hydrogel lens.
(9) To arrange an interview some years back took a written letter to his apartment in Edinburgh's New Town followed by a wait of several months, after which a reply arrived – handwritten in ink – in an envelope sporting a stamp of the Crab Nebula.
(10) That includes the Blue Marble, a photograph taken by the Apollo 17 crew as they travelled towards the moon in 1972, the “first selfie in space”, taken by Buzz Aldrin during a spacewalk in 1966, and the Eagle Nebula’s Pillars of Creation, taken by the Hubble Space Telescope, most recently in 2014.
(11) These giant white ears are cocked to interstellar whispers: the formation of stars, nebulae and supernovae.
(12) Known as the Helix nebula, the fading star belongs to a class of celestial objects named "planetary nebulae" in the 18th century, after their likeness to gas giants, such as Jupiter.
(13) Best known for her children's fantasy series the Earthsea quartet, and for the science fiction title The Left Hand of Darkness, Le Guin is the author of 21 novels, 11 volumes of short stories, three collections of essays, 12 books for children, six volumes of poetry and four of translation, and the recipient of literary awards including the Hugo, Nebula and National Book award.
(14) For years now, the wallpaper on my computer has been a picture from one of Nasa's many troves of stunning photos, sometimes a distant nebula or galaxy or close-up of a nearby planet or Earth.
(15) "The sense that there's a bridge, that a hand can be extended, and you can step from the Earth, from the supermarket car park, into the Andromeda nebulae or whatever."
(16) Contact lens intolerance in keratoconus may be due to the formation of a proud nebula at or near the apex of the cone that gives rise to contact lens related abrasions.
(17) The role and relative contributions of different forms of energy to the synthesis of amino acids and other organic compounds on the primitive earth, in the parent bodies or carbonaceous chondrites, and in the solar nebula are examined.
(18) Among them are the first sketches of nebulae by Sir John Herschel, who visited South Africa with a telescope in the 1830s, and Newton's death mask.