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单词 scotoma
释义

scotoman.

Brit. /skə(ʊ)ˈtəʊmə/, U.S. /skoʊˈtoʊmə/, /skəˈtoʊmə/
Inflections: Plural scotomata, scotomas.
Origin: A borrowing from Latin. Etymon: Latin scotoma.
Etymology: < post-classical Latin scotoma dizziness, vertigo (1267 in a British source), loss of vision in part of the visual field (1785 or earlier) < Hellenistic Greek σκότωμα dizziness < ancient Greek σκοτοῦν to darken, make dim-sighted ( < σκότος darkness: see scoto- comb. form2) + -μα (see -oma comb. form). With sense 2 compare German Skotom (1803 or earlier), French scotome (1855).
1. Medicine. Dizziness or vertigo, esp. when accompanied by impairment of vision; an instance of this. Cf. scotomia n., scotomy n. Obsolete.
ΘΚΠ
the world > health and disease > ill health > a disease > vertigo > [noun] > with dim sight
scotomiaa1400
scotomya1400
scotoma1543
the world > health and disease > ill health > a disease > disorders of eye > disordered vision > [noun] > dimness or poor vision
dimnessc825
misteOE
mistinessa1382
scotomiaa1400
scotomya1400
obfuscation?a1425
scotoma1543
purblindness1552
sand-blindness1552
caligation1615
caliginousness1620
weak-sightedness1632
cecutiency1646
caliginosity1657
dimsightedness1662
dim1726
caligo1801
asthenopia1875
greying out?1942
1543 B. Traheron Interpr. Straunge Wordes in tr. J. de Vigo Most Excellent Wks. Chirurg. sig. &&.viv/1 Scotomia... Some go about, to make a foolysh difference of scotoma, and vertigo.
1617 R. Brathwait Smoaking Age 103 in tr. ‘B. Multibibus’ Solemne Ioviall Disputation What herbes or plants soever were preservative against the Scotoma, Oedema, Lithiasis, Paralysis, Celphalgia [sic], Lycanthropia.
1668 W. Rowland tr. J. Feyens New Treat. Spirits & Wind x. 34 The Scotoma is, when there is not only a turning round, but a mist before the eyes.
?1785 S. Freeman Ladies Friend (ed. 3) 222 If, in any that have this disease, things appear to their eyes bloody and reddish, it foretells madness; if purple colour, the falling sickness; especially such that have the scotoma, or dark Vertigo.
1822 J. M. Good Study Med. III. 495 Hence, Linnéus..has even made scotoma, or dizziness with blindness and a tendency to swoon, a distinct genus also.
2. Chiefly Medicine and Ophthalmology. Total or partial loss of vision in a localized part of the visual field; an area of the visual field in which this occurs; a blind spot (also figurative). In early use also: †a floater in the vitreous humour (cf. muscae volitantes n.) (obsolete).Scotomata are sometimes divided into positive and negative, denoting those of which the persons affected are aware or unaware, respectively.
ΘΚΠ
the world > health and disease > ill health > a disease > disorders of eye > disordered vision > [noun] > limited visual field
hemiopia1811
scotoma1821
concentric contraction1858
hemianopia1882
hemianopsia1883
field defect1884
quadrantanopia1909
quadrantanopsia1910
macular sparing1940
tunnel vision1949
1821 G. C. Monteath tr. C. H. Weller Man. Dis. Human Eye II. 76 (note) The visus muscorum..is not uncommonly observed when the eye alternately looks at dark and bright objects. In such cases the Scotomata are moveable, and disappear at times entirely.
1826 Lancet 29 July 547/1 Floating bodies appearing before the eye have been called muscæ volitantes, and when only a single black speck is seen, it is called scotoma.
1875 H. Walton Pract. Treat. Dis. Eye (ed. 3) 645 Without limitation of the visual field or scotomata,..direct vision may be much diminished in the region of the yellow spot.
1897 T. C. Allbutt et al. Syst. Med. III. 219 Central scotoma, or loss of vision in the central part of the field, is common [in diabetes].
1943 Horizon Oct. 257 As with all neurotics, the confessions of Kierkegaard only contain a grain of the truth; the analytic scotoma constantly intervenes.
1992 Sci. Amer. May 91/1 A person is often completely unaware of a scotoma.
2006 Independent 28 Nov. (Extra section) 9/2 The rippling, or shimmering, light that I saw, and the distorted vision are classic symptoms (the small blurred area is known as a positive scotoma, meaning blind spot).

Derivatives

scoˈtomatous adj. [after German scotomatös (1865 or earlier)] of, relating to, or of the nature of (a) scotoma (sense 2).
ΘΚΠ
the world > health and disease > ill health > a disease > disorders of eye > disordered vision > [adjective] > having dimness or poor vision
darkOE
dima1220
bissona1250
murka1300
mistedc1450
obfuscatec1487
spurblind1508
sand-blind1538
dim-sighted1561
blinking1568
dimmed1590
weak-sighteda1591
purblind1592
sand-eyed1592
thick-eyed1598
left-eyed1609
mole-eyed1610
blindish1611
mole-sighted1625
sanded1629
veiled1633
weak-eyed1645
scotomatical1656
mole-blinda1660
swimming1697
wavering1842
foggy1847
scotomatous1866
clouding1868
wall-eyed1873
1866 Ophthalmic Rev. 2 355 But no essential change is observed within the scotomatous area.
1970 O. Sacks Migraine iii. 73 Cardinal characteristics of migraine aura, in its visual (scotomatous), tactile (paraesthetic), and aphasic forms.
2008 Jrnl. Neurol. Sci. 273 71/2 A partial visual field defect was not contiguous from top to bottom, and this category included quadrant, sector or scotomatous defects.
This entry has been updated (OED Third Edition, June 2011; most recently modified version published online March 2022).
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n.1543
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