(1) Thirteen patients had had a posterior dislocation with an associated fracture of the femoral head located either caudad or cephalad to the fovea centralis (Pipkin Type-I or Type-II injury), one had had a posterior dislocation with associated fractures of the femoral head and neck (Pipkin Type III), two had had a posterior dislocation with associated fractures of the femoral head and the acetabular rim (Pipkin Type IV), and three had had a fracture-dislocation that we could not categorize according to the Pipkin classification.
(2) Foveal involvement included coarse foveal granularity, thinning of the foveal retinal pigment epithelium, increasing encirclement of the fovea with focal areas of atrophy, and minimal macular drusen.
(3) Detection thresholds at 10 Hz and high grating contrasts were approximately 11-15 arcsec in the fovea and 37-47 arcsec at 30 degrees eccentricity.
(4) These data reject the possibility that albino central vision is similar to normal peripheral vision, but the results are predictable on the hypothesis that the central retina of albinos is a spatially magnified (underdeveloped) version of the normal fovea.
(5) Macular pigment density was determined by comparing sensitivity under these conditions for the fovea, where macular pigment is maximal, and 5 degrees temporally.
(6) We confirmed this observation (Experiment I) and have mapped out a 2 dimensional "perceptive field" for crowding in the fovea using a 2 dot target (Experiment II).
(7) At earlier fetal ages, the site of the future fovea was identified by several criteria that included peak density of ganglion cells, lack of blood vessels in the inner retinal layers, arcuate fiber bundles, and the absence of rod outer segments in the photoreceptor layer.
(8) By reconstructing the fovea from serial sections, we were able to compare the densities of cones, cone pedicles and ganglion cells; in this way we found that there are more than three ganglion cells per foveal cone.
(9) There are two separate regions of high magnification factor, the projection areas of the fovea and the middle of the red area in the retina, each of which has a correspondingly high density of neurones in the ganglion cell layer.
(10) From 1967 to 1987, 16 patients underwent repair of chronic cerebrospinal fluid rhinorrhea in the cribriform plate or fovea ethmoidalis at the University of Iowa with an osteomucoperiosteal flap.
(11) The fovea is represented at the lateralmost portion of MT, while the retinal periphery is represented medially.
(12) The greatest thickness of cartilage was always found lateral of the fovea capitis at the medial margin of the pressure area ("Druckbündelzone") of the cancellous bone, whereas the dorsomedial part of the head showed a zone of thinning, extending to the medial margin of the fovea capitis.
(13) The nature and size of a localized scotoma such as the type caused by a macular lesion was estimated by measuring spatial contrast sensitivity as a function of retinal area centered on the fovea.
(14) In divergent squint, the fovea competes with the much weaker nasal hemifield.
(15) The nonfreezable water content (bound water) showed a decreasing gradient along the optic axis from lens to fovea; an opposite trend than that found in bovine vitreus.
(16) ERGs recorded by this technique can be considered focal since (i) they show a sharp fall-off in amplitude when the stimulus is displaced from the fovea, and (ii) they are no longer recordable when the stimulus is centered on the optic disk or on a large macular scar.
(17) This was compared with MF at the dorsal lateral geniculate nucleus and at striate cortex, revealing that the relative representation of the fovea increases substantially in both thalamus and cortex.
(18) The authors present and discuss the results obtained and suggest that photocoagulation of subretinal new vessels not involving the fovea can be worth performing.
(19) Their receptive fields were usually large, not restricted to the contralateral visual field and always included the fovea.
(20) We feel that tenuous attachments of the vitreous body to the fovea could exert traction on the vitreo-retinal interface or shrinkage of a fibrocellular membrane on the inner foveal surface could lead to the observations made by us.
Sharp
Definition:
(superl.) Having a very thin edge or fine point; of a nature to cut or pierce easily; not blunt or dull; keen.
(superl.) Terminating in a point or edge; not obtuse or rounded; somewhat pointed or edged; peaked or ridged; as, a sharp hill; sharp features.
(superl.) Affecting the sense as if pointed or cutting, keen, penetrating, acute: to the taste or smell, pungent, acid, sour, as ammonia has a sharp taste and odor; to the hearing, piercing, shrill, as a sharp sound or voice; to the eye, instantaneously brilliant, dazzling, as a sharp flash.
(superl.) High in pitch; acute; as, a sharp note or tone.
(superl.) Raised a semitone in pitch; as, C sharp (C/), which is a half step, or semitone, higher than C.
(superl.) So high as to be out of tune, or above true pitch; as, the tone is sharp; that instrument is sharp. Opposed in all these senses to flat.
(superl.) Very trying to the feelings; piercing; keen; severe; painful; distressing; as, sharp pain, weather; a sharp and frosty air.
(superl.) Cutting in language or import; biting; sarcastic; cruel; harsh; rigorous; severe; as, a sharp rebuke.
(superl.) Of keen perception; quick to discern or distinguish; having nice discrimination; acute; penetrating; sagacious; clever; as, a sharp eye; sharp sight, hearing, or judgment.
(superl.) Eager in pursuit; keen in quest; impatient for gratification; keen; as, a sharp appetite.
(superl.) Keenly or unduly attentive to one's own interest; close and exact in dealing; shrewd; as, a sharp dealer; a sharp customer.
(superl.) Composed of hard, angular grains; gritty; as, sharp sand.
(superl.) Steep; precipitous; abrupt; as, a sharp ascent or descent; a sharp turn or curve.
(superl.) Uttered in a whisper, or with the breath alone, without voice, as certain consonants, such as p, k, t, f; surd; nonvocal; aspirated.
(adv.) To a point or edge; piercingly; eagerly; sharply.
(adv.) Precisely; exactly; as, we shall start at ten o'clock sharp.
(n.) A sharp tool or weapon.
(n.) The character [/] used to indicate that the note before which it is placed is to be raised a half step, or semitone, in pitch.
(n.) A sharp tone or note.
(n.) A portion of a stream where the water runs very rapidly.
(n.) A sewing needle having a very slender point; a needle of the most pointed of the three grades, blunts, betweens, and sharps.
(n.) Same as Middlings, 1.
(n.) An expert.
(v. t.) To sharpen.
(v. t.) To raise above the proper pitch; to elevate the tone of; especially, to raise a half step, or semitone, above the natural tone.
(v. i.) To play tricks in bargaining; to act the sharper.
(v. i.) To sing above the proper pitch.
Example Sentences:
(1) Basal 20 alpha DHP levels remained low until a sharp rise at mid pro-oestrus.
(2) Whole-virus vaccines prepared by Merck Sharp and Dohme (West Point, Pa.) and Merrell-National Laboratories (Cincinnati, Ohio) and subunit vaccines prepared by Parke, Davis and Company (Detroit, Mich.) and Wyeth Laboratories (Philadelphia, Pa.) were given intramuscularly in concentrations of 800, 400, or 200 chick cell-agglutinating units per dose.
(3) Gonadectomy of females was accompanied by changes in the activity of individual HAS links in different direction--some reduction of ACTH in the hypophysis, a sharp and significant fall of the peripheral blood glucocorticoid level and a marked significant elevation of hydrococortisone production in the adrenal cortex in vitro.
(4) The University of the Arts London and Sunderland, Sheffield Hallam, Manchester Met and Leeds Met university have also experienced sharp declines in applications.
(5) A sharp decrease in oxygen uptake occurred in Neurospora crassa cells that were transferred from 30 degrees C to 45 degrees C, and the respiration that resumed later at 45 degrees C was cyanide-insensitive.
(6) In contrast to findings in the rat and dog, no sharp drop but a gradual fall in CLi was observed at decreasing FENa values down to 0.02%.
(7) A more specific differentiation, as indicated by the sharp increase in GAD levels which was concurrent with an increase in interneuronal contacts, lagged behind the initial growth.
(8) It appears that the decline in plasma IGF-I lags considerably behind the sharp fall in plasma GH levels and expression of hepatic IGF-I mRNA.
(9) Supplementation of Mg resulted in a sharp increase in serum PTH level with a rapid disappearance of the dissociation between the two immunoassays of PTH.
(10) A.CA animals were extremely susceptible, showing a sharp and sustained increase in parasitemia starting on day 12, followed by death no later than day 15 post-inoculation.
(11) There was a sharp transition with actin nearly saturated with S1: when the S1 to actin ratio was low, the kinetics were fast (K1 greater than 300 microM, k2 greater than 40 s-1); when it was high, they were slow (K1 = 14 microM, k2 = 2 s-1).
(12) Low calcium causes an increase in optimum frequency, a decrease in current threshold, and an increase in sharpness of tuning in both real axons and axons computed according to the Hodgkin-Huxley formulation; high calcium causes opposite effects.
(13) The Tea Party movement has turned climate denial into a litmus test of conservative credentials – and that has made climate change one of the most sharp divisions between Obama and Romney.
(14) The presence in lamprey kidney of a loop which is similar to Henle's loop in mammals and birds indicates that the development of the system of osmotic concentration conditioned by the formation in the kidney of the medulla and from a sharp increase in renal arterial blood supply.
(15) There is no longer a sharp dividing line between working and rentiering.
(16) We are going to see a sharp fall unless sellers hold the sector up by making aggressive offers.
(17) A sharp increase in the intensity of lipids biochemiluminiscence and decrease in the tissue homogenates biochemiluminiscence were observed during the period of progressive tumour growth on the 6-8 days following introduction of the virus.
(18) By no means is this a new theme, but it has taken on an added sharpness and urgency after the conferences.
(19) The blood lymphocytes were small with scanty cytoplasm, densely condensed nuclear chromatin, and deep clefts originating in sharp angles from the nuclear surface.
(20) In sharp contrast, the coverage provided by the various mainstream news channels and newspapers not only seems – with some exceptions – unresponsive and stilted, but often non-existent.