File:EB1911 Vision - Ideal or Schematique Eye.jpg

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English: A, summit of cornea; SC, sclerotic; S, Schlemm's canal; CH, choroid; I, iris; M, ciliary muscle; R, retina; N, optic nerve; HA, aqueous humour; L, crystalline lens, the anterior of the double lines on its face showing its form during accommodation; HV, vitreous humour; DN, internal rectus muscle; DE, external rectus; YY′, principal optical axis; ΦΦ, visual axis, making an angle of 5° with the optical axis; C, centre of the ocular globe. The cardinal points of Listing: H₁H₂, principal points; K₁K₂, nodal points; F₁F₂, principal focal points. The dioptric constants according to Giraud-Teulon: H, principal points united; Φ₁Φ₂, principal foci during the repose of accommodation; Φ′₁Φ′₂, principal foci during the maximum of accommodation; O, fused nodal points.
Date published 1911
Source “Vision,” Encyclopædia Britannica (11th ed.), v. 28, 1911, p. 132, fig. 2.
Author Unknown artistUnknown artist
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Public domain This image comes from the 13th edition of the Encyclopædia Britannica or earlier. The copyrights for that book have expired in the United States because the book was first published in the US with the publication occurring before January 1, 1929. As such, this image is in the public domain in the United States.

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current14:17, 27 August 2021Thumbnail for version as of 14:17, 27 August 2021937 × 585 (177 KB)Bob Burkhardt (talk | contribs){{Information |description = {{en|1=A, summit of cornea; SC, sclerotic; S, Schlemm's canal; CH, choroid; I, iris; M, ciliary muscle; R, retina; N, optic nerve; HA, aqueous humour; L, crystalline lens, the anterior of the double lines on its face showing its form during accommodation; HV, vitreous humour; DN, internal rectus muscle; DE, external rectus; YY′, principal optical axis; ΦΦ, visual axis, making an angle of 5° with the optical axis; C, centre of the ocular globe. The cardinal points...

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