focimetryn.

Brit.

/fəʊˈsɪmᵻtri/, U.S.

/foʊˈsɪmᵻtri/

Forms:

α. 1800s– focimetry.

β. 1800s– focometry Brit. /fəʊˈkɒmətri/, U.S. /foʊˈkɑmətri/.

Origin: Formed within English, by derivation. Etymons: focus n., -i- connective, -metry comb. form.

Etymology: < foc- (in focus n.) + -i- connective + -metry comb. form, after focimeter n.With form focometry compare -o- connective, -ometry comb. form.

Optics.

The measurement of focal length.

ΘΚΠ

the world > physical sensation > sight and vision > optical instruments > lens > [noun] > measurement of focal distance

focimetry1881

1881 G. R. Piggott in Nature No. 622. 515/2 If now an over-corrected lens were substituted, the diffraction rings..and the nebulosity..exactly changed positions as regards focimetry.

1891 Proc. Royal Soc. 1890–91 49 225 The accepted methods of focometry.

1917 London, Edinb., & Dublin Philos. Mag. 6th Ser. 33 157 (title) The focometry of lens-combinations.

1990 Ophthalmic & Physiol. Optics 10 305 (title) Semi-automatic focimetry.

2008 Ophthalmic & Physiol. Optics 28 411/1 One hundred per cent of practitioners carried out focimetry..of the patient's existing spectacles.

This entry has been updated (OED Third Edition, September 2016; most recently modified version published online March 2022).

单词	focimetry
释义	focimetryn. Brit. /fəʊˈsɪmᵻtri/, U.S. /foʊˈsɪmᵻtri/ Forms: α. 1800s– focimetry. β. 1800s– focometry Brit. /fəʊˈkɒmətri/, U.S. /foʊˈkɑmətri/. Origin: Formed within English, by derivation. Etymons: focus n., -i- connective, -metry comb. form. Etymology: < foc- (in focus n.) + -i- connective + -metry comb. form, after focimeter n.With form focometry compare -o- connective, -ometry comb. form. Optics. The measurement of focal length. ΘΚΠ the world > physical sensation > sight and vision > optical instruments > lens > [noun] > measurement of focal distance focimetry1881 1881 G. R. Piggott in Nature No. 622. 515/2 If now an over-corrected lens were substituted, the diffraction rings..and the nebulosity..exactly changed positions as regards focimetry. 1891 Proc. Royal Soc. 1890–91 49 225 The accepted methods of focometry. 1917 London, Edinb., & Dublin Philos. Mag. 6th Ser. 33 157 (title) The focometry of lens-combinations. 1990 Ophthalmic & Physiol. Optics 10 305 (title) Semi-automatic focimetry. 2008 Ophthalmic & Physiol. Optics 28 411/1 One hundred per cent of practitioners carried out focimetry..of the patient's existing spectacles. This entry has been updated (OED Third Edition, September 2016; most recently modified version published online March 2022). < n.1881
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