ARISTOTLE 



780 a 



yap TO vvKTepivov (f)cos' a/xa yap Kal Svgkivtjtov ev 



rfj vvktI oXojs ytyverai to vypov. Set Se ovre 



jjiT] KLveladai avro ovre jxaXXov fj^ Siacj^aves' eV- 



Kpovei yap rj laxvporepa KivqaLS ttjv aodevearepav. 



10 Sio /cat OLTTO Twv laxvpcov ■^(pcjopbdTCxiv jxera^dX- 

 Xovres ovx opcoai, Kal e/c tou tjXlov els to a kotos 

 iovTes' la)(vpa yap ovaa rj ivvTrdpxovaa KLvrjats 

 /ccoAuet TTjv dvpadev, kol oXojs ovtc adivovaa ovTe 

 dadevrjs oiJjls to. XapLTipd SwaTat opdv Std to 

 TTacTxetv TL fxaXXov Kal Ktveladat, to vypov. 8?yAot 



15 Se Kal rd dppojoT'qpLaTa Trjs oifjecos eKaTepas- to 

 fxev yap yXavKOifxa ytVeTai fxdXXov toIs yXavKols, 

 ol Se vvKToXoiTTes KaXovfxevoL tols fi€Xavo(f)6 dXfxo is . 

 can Se to fxev yXavKajfxa ^ripoTrjs Tis [fJiaXXovY 

 Toiv opiixdrajv , Sto Kal avp-^aivei puaXXov^ yrjpd- 

 GKovaiv ^rjpaiveraL ydp, wanep Kal to dXXo adj[j.a, 



20 /cat TavTa Ta popua rrpos to yrjpas' 6 Se vvKrdXunfj 

 vypoTTjTOS nXeovaap.os, Sto Tot? veojTepoLS ytVcTat 

 pLoXXov vypoTepos ydp 6 iyK€<f)aXos d tovtchv. 

 'q Se pLearj rod ttoXXov Kal tov oXiyov vypov ^eX- 



^ fiX: f, ^ vulg. 2 seel. A.-W. 



* fj.dXXov om. Z. 



" The movement already in progress in the eye is so strong 

 that it precludes any fresh movement that comes from out- 

 side from making itself felt in the eye. 



'' Dark eyes have so much fluid in them that the weakness 

 of the light at night cannot set them in movement (780 a 5). 

 — Night-blindness is also the sense of the word as defined by 

 Galen ; but the term seems to have been used in opposite 

 senses in ancient times ; e.g., in Hippocrates, Prorrh. 11. 33 

 (ix. 64 Littre) vvktoXcottcs = ol rijs vvktos opcovres (though one 

 MS. apparently reads ovx opwvres) ; and see L. & S. 



" But he has said above (779 a 28 and 779 b 11 ; repeated 

 below 780 b 1) that the eyes of new-born infants and young 



498 



