(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.
Xerophthalmia
Definition:
(n.) An abnormal dryness of the eyeball produced usually by long-continued inflammation and subsequent atrophy of the conjunctiva.
Example Sentences:
(1) We measured parasitemia, mortality, serum retinol, liver retinol, spleen weight, and degree of xerophthalmia in vitamin A-deficient rats (A-), pair-fed control rats (A+PF), and ad libitum-fed control rats (A+AL) infected with Plasmodium berghei, a rodent malarial parasite.
(2) Vitamin supplements, especially A, reverse defects associated with xerophthalmia.
(3) Since measles and xerophthalmia have frequently been associated, vitamin A supplementation for measles patients is recommended particularly for malnourished children.
(4) We describe our technique and experience in the prevention of xerophthalmia by organising a distinct entity called a xerophthalmia clinic in our eye camps.
(5) In conclusion, 17 of 23 children with persistent diarrhea had abnormal CIC results, significantly low serum retinol levels, and significantly high RDR results, although they had not yet manifested xerophthalmia.
(6) This ultimately produced nyctalopia, xerophthalmia and keratomalacia with bilateral corneal perforation.
(7) Xerophthalmia is a common complication of vitamin A deficiency in communities where malnutrition is found.
(8) Twenty two cases were studied for early detection of Xerophthalmia by impression cytology and Rose Bengal staining.
(9) All corneal cases in the study were accompanied by diarrhea and malnutrition, indicating xerophthalmia to be symptomatic of the whole spectrum of malnutrition.
(10) Xerostomia and xerophthalmia are common and potentially serious local side effects of radiotherapy for head and neck cancer.
(11) Risk of xerophthalmia was significantly higher for children from households without any of the indicators of relative wealth used.
(12) Village clustering of xerophthalmia would necessitate a twofold increase in sample size.
(13) A cross-sectional population based study was done to provide information on the extent to which xerophthalmia and trachoma contribute to blindness in the valley population.
(14) The case is described of a 36 years old woman with bilateral xerophthalmia secondary to his diet.
(15) 33 patients with scleroderma, xerostomia and xerophthalmia underwent biopsy of 3 to 5 labial salivary glands.
(16) The concentrations of retinol and of beta-carotene were measured in 742 children, including those with xerophthalmia and every twentieth of the remaining children.
(17) We describe a 67-year-old woman who had aspiration pneumonitis characterized by a nodular infiltrate in the right middle lobe of the lung and nocturnal coughing after beginning topical application of an ointment (Lacri-Lube) for treatment of xerophthalmia.
(18) Evaluation included a specific questionnaire for subjective xerophthalmia and xerostomia, slit-lamp eye examination after rose Bengal staining.
(19) It is suggested that xerophthalmia screening be made an essential component of routine medical check-up in schools with XN (night blindness with or without conjunctival xerosis) and XIB (Bitot's spots) used as criterion for screening to effectuate early detection and treatment of xerophthalmia.
(20) Xerophthalmia is no longer seen in Europe since the 19th century.