XXXVI 



CONTENTS. 



§ 585. The phenomena of ' contrast ' in their bearing on the theories of 



colour vision 935 



§ 586. Recurrent sensations. Ocular phantoms or hallucinations . . 936 



SECTION IX. 



Binocular Vision. 



§ 587. The movements of the eye-ball ; their limitations. Centre of rota- 

 tion, visual axis, visual plane 939 



§ 588. The visual field and field of sight of one eye and of both eyes . . 940 



§ 589. Corresponding or identical points 942 



§ 590. The movements of the eye-ball ; the primary position and secondary 



positions ; the kind of movements which are possible . . 944 



§ 591. Listing's Law ; the experimental proof 940 



§ 592. The muscles of the eye-ball 948 



§ 593. The action of the ocular muscles 949 



§ 594. The nervous mechanism of the movements of the eye-balls ; the 



coordination of the movements 952 



§ 595. The nervous centres for the movements of the eye-balls . . . 956 



§ 596. The Horopter 957 



SECTION X. 

 On Some Features of Visual Perceptions and on Visual Judgments. 



§ 597. On the differences between the objective field of sight and the sub- 

 jective field of vision 959 



§ 598. The psychical processes belonging to visual perceptions ; illusions 



and visual judgments 961 



§ 599. Appreciation of apparent size . 



§ 600. Judgment of distance and of actual size 



§ 601. The judgment of solidity . 



§ 602. The struggle of the two fields of vision 



962 

 964 

 960 

 967 



SECTION XI. 



The Nutrition of the Ete. 



§ 603. The arrangement of the blood vessels 

 § 604. The vaso- motor changes in the eye . 



909 

 970 



The Lymphatics of the Eye. 



§ 605. The lymphatic vessels and lymph spaces of the eye .... 970 



§ 600. The aqueous humour ; the changes taking place in it ; how effected 972 



§ 607. The vitreous humour ; the changes taking place in it . . 974 



