photopsian.

Brit.

/fəʊˈtɒpsɪə/, U.S.

/foʊˈtɑpsiə/

Origin: Formed within English, by compounding. Etymons: photo- comb. form, -opsia comb. form.

Etymology: < photo- comb. form + -opsia comb. form.

Medicine.

A condition characterized by subjective sensations of light or colour, often in the form of flashes and sparks, due to abnormal stimulation of the retina or other parts of the visual pathway.

ΘΚΠ

the world > physical sensation > sight and vision > thing seen > optical illusion > [noun] > an optical illusion > illusion of light

photopsia1807

photopsy1850

photism1881

1807 R. Morris & J. Kendrick Edinb. Med. & Physical Dict. II Photopsia,..lucid vision; an affection of the eye in which the patient perceives luminous rays, ignited lines, or corruscations. This is a very common circumstance even where there is no material defect in vision.

1841 Lancet 24 Apr. 153/2 The vision fails gradually, attended with muscæ volitantes, photopsia, a distorted broken image, &c.

1889 Lancet 28 Dec. 1331/1 In the optic nerve these conditions cause photopsia or flashes of light, flames, sparks, and stars.

a1978 ‘H. MacDiarmid’ Ephphatha in Compl. Poems (1993) I. 393 No phosphene or photopsia any longer Can supplement or supplant it.

1983 Amer. Jrnl. Ophthalmol. 96 783 A total of 589 patients..with photopsia, vitreous floaters, or both participated in a prospective study designed to identify patients at particularly high risk for retinal tears.

1991 Opera News Sept. 20/2 Zimmerman apparently was afflicted with photopsia, an eye condition characterized by the appearance of sparks and flashes due to retinal irritation.

Derivatives

pho'topsic adj. rare

ΚΠ

1863 C. Reade Hard Cash III. 53 Paul an incoherent lunatic..who admits having been once the victim of a photopsic illusion.

This entry has been updated (OED Third Edition, March 2006; most recently modified version published online March 2022).

单词	photopsia
释义	photopsian. Brit. /fəʊˈtɒpsɪə/, U.S. /foʊˈtɑpsiə/ Origin: Formed within English, by compounding. Etymons: photo- comb. form, -opsia comb. form. Etymology: < photo- comb. form + -opsia comb. form. Medicine. A condition characterized by subjective sensations of light or colour, often in the form of flashes and sparks, due to abnormal stimulation of the retina or other parts of the visual pathway. ΘΚΠ the world > physical sensation > sight and vision > thing seen > optical illusion > [noun] > an optical illusion > illusion of light photopsia1807 photopsy1850 photism1881 1807 R. Morris & J. Kendrick Edinb. Med. & Physical Dict. II Photopsia,..lucid vision; an affection of the eye in which the patient perceives luminous rays, ignited lines, or corruscations. This is a very common circumstance even where there is no material defect in vision. 1841 Lancet 24 Apr. 153/2 The vision fails gradually, attended with muscæ volitantes, photopsia, a distorted broken image, &c. 1889 Lancet 28 Dec. 1331/1 In the optic nerve these conditions cause photopsia or flashes of light, flames, sparks, and stars. a1978 ‘H. MacDiarmid’ Ephphatha in Compl. Poems (1993) I. 393 No phosphene or photopsia any longer Can supplement or supplant it. 1983 Amer. Jrnl. Ophthalmol. 96 783 A total of 589 patients..with photopsia, vitreous floaters, or both participated in a prospective study designed to identify patients at particularly high risk for retinal tears. 1991 Opera News Sept. 20/2 Zimmerman apparently was afflicted with photopsia, an eye condition characterized by the appearance of sparks and flashes due to retinal irritation. Derivatives pho'topsic adj. rare ΚΠ 1863 C. Reade Hard Cash III. 53 Paul an incoherent lunatic..who admits having been once the victim of a photopsic illusion. This entry has been updated (OED Third Edition, March 2006; most recently modified version published online March 2022). < n.1807
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