LIST OF FIGURES IN PART IV. 



FIG. PAGE 



134. Diagrammatic outline of a horizontal section of the eye to illustrate 



the relations of the various parts 1141 



135. Diagram of simple optical system 1145 



136. Diagram of the schematic or diagrammatic eye .... 1148 



137. Diagram of the formation of a retinal image 1149 



138. Diagram of Schemer's experiment 1153 



139. Diagram of images reflected from the eye 1157 



140. Diagram of the ciliary muscle as seen in a vertical radial section of 



the ciliary region " . . . 1165 



141. Diagram to illustrate accommodation 1170 



142. Diagrammatic representation of the nerves governing the pupil . 1174 



143. Diagram illustrating chromatic aberration . . . . . 1188 



144. Diagram to illustrate entoptical images 1190 



145. Diagram to illustrate the structure of the retina .... 1198 



146. Diagram of three primary colour sensations 1230 



147. Diagram to illustrate Hering's theory of colour vision . . . 1233 



148. Diagram illustrating the formation of Purkinje's figures when the 



illumination is directed through the sclerotic . . . . 1250 



149. Diagram illustrating the formation of Purkinje's figures when the 



illumination is directed through the cornea 1251 



150. Diagram to illustrate the principles of a simple form of ophthalmo- 



scope .... 1259 



151. Figure to illustrate irradiation . . . . ' . . . 1264 



152. The visual field of the right eye 1274 



153. The visual fields (fields of sight) of the two eyes when the eyes 



converge to the same fixed point 1275 



154. Diagram illustrating corresponding points 1276 



155. Figure to illustrate the insertions of the ocular muscles . . . 1282 



156. Diagram to illustrate the actions of the ocular muscles . . . 1284 



157. Diagram illustrating a simple horopter 1291 



158. Figure to illustrate the appreciation of apparent size . . . 1296 



159. The same . 1297 



