. Manual of mental and physical tests : in two parts : a book of directions compiled with special reference to the experimental study of children in the laboratory or classroom. FIG. 41. MADDOX TEST FIG. 42. MADDOX TEST FIG. 43. MADDOX TESTFOB VERTICAL DEVIA- FOB VEBTICAL DEVIA- FOR VERTICAL DEVIA-TION ; OBTHOFHOBIA. TION ; BIGHT HYFER- TION ; LEFT HYPEB-PHORIA. PHOBIA. Stevens stenopaic lens (Fig. 44) may be substituted for theMaddox rod. A single determination then suffices for bothhorizontal and vertical displacement. In orthophoria, thecandle flame appears in the center of a diffused disc
. Manual of mental and physical tests : in two parts : a book of directions compiled with special reference to the experimental study of children in the laboratory or classroom. FIG. 41. MADDOX TEST FIG. 42. MADDOX TEST FIG. 43. MADDOX TESTFOB VERTICAL DEVIA- FOB VEBTICAL DEVIA- FOR VERTICAL DEVIA-TION ; OBTHOFHOBIA. TION ; BIGHT HYFER- TION ; LEFT HYPEB-PHORIA. PHOBIA. Stevens stenopaic lens (Fig. 44) may be substituted for theMaddox rod. A single determination then suffices for bothhorizontal and vertical displacement. In orthophoria, thecandle flame appears in the center of a diffused disc of light;in heterophoria, it is displaced to the right or left, above jorbelow, or obliquely, in a manner corresponding to that of theMaddox line-and-flame test (Fig. 45). The stenopaic lens con- 180 SBNSOEY CAPACITY sists of a convex lens of 13 D., covered, save for a very smallopening in tbe center. The principle is again that of FIG. 44. STEVENS STENOPAIC TEST WITH PRISMS Apparatus.—Trial frame. Four prisms, one of 2, one of 8,and two of 20 prism-diopters, of the circular pattern fitted forthe trial frame.^ Candle. Meter stick.
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Keywords: ., boo, bookcentury1900, bookdecade1920, booksubjectpsychophysiology
