# Opticorum recensio Theonis ιζ΄.

Euclid, Opticorum recensio Theonis, ιζ΄.. Ancient Greek.

Canonical: https://interlinea.aeterna-institute.org/library/greek/euclid/opticorum-recensio-theonis/%CE%B9%CE%B6%CE%84.

Ὅσα ἀλλήλων ὑπερέχει τοῦ ὄμματος ἐπʼ εὐθείας τῷ ἐλάσσονι μεγέθει ὄντος, προσιόντος τε καὶ ἀφιστα μένου τοῦ ὄμματος τῷ ἴσῳ αἰεὶ δόξει τὸ ὑπερφαινό μενον τοῦ ἐλάσσονος ὑπερέχειν. ὑπερεχέτω γὰρ τὸ Β ∠ τοῦ ΘΗ τῷ ΒΓ, καὶ ἐπιζευχθεῖσα ἡ ΓΘ ἐκβεβλήσθω, καὶ ἔστω τὸ ὄμμα ἐπὶ τοῦ Ζ. οὐκοῦν ἡ ἀπὸ τοῦ ἀκτὶς προσπίπτουσα κατὰ τὴν ΖΓ ἐνεχθήσεται. πάλιν δὴ μετακείσθω τὸ ὄμμα ἐπὶ τοῦ Κ. οὐκοῦν διὰ τὰ αὐτὰ ἡ ἀπὸ τοῦ Κ ὄμματος ἀκτὶς προσπίπτουσα κατὰ τὴν ΚΓ ἐνεχθήσεται. τῷ αὐτῷ ἄρα ὑπερέξει τὸ Β∠ τοῦ ΘΗ καὶ προσιόντος τοῦ ὄμματος καὶ ἀφισταμένου.

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Euclid, Opticorum recensio Theonis, ed. Johan Ludvig Heiberg, Heinrich Menge. Text: The Greek Library, from the Perseus Digital Library and other open sources, CC BY-SA 4.0. Changes: apostrophes normalised and the text divided into reading sections by Interlinea.
License: CC BY-SA 4.0 (https://creativecommons.org/licenses/by-sa/4.0/). Source: https://thegreeklibrary.pages.lisn.upsaclay.fr/works/tlg1799.tlg010.local001/.