xxxvi CONTENTS. 



PAGE 



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 946 



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 OP 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 962 



600. Judgment of distance and of actual size 964 



601. The judgment of solidity 966 



602. The struggle of the two fields of vision 967 



SECTION XI. 

 THE NUTRITION OP THE EYE. 



603. The arrangement of the blood vessels 969 



604. The vaso-motor changes in the eye 970 



The Lymphatics of the Eye. 



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

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

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



