Text-book of ophthalmology . DISEASES OF THE OPTIC NERVE 613 to the central side of the chiasm and upon the same side as the blind halfof the retina. [But see pages 615, 616.] If the chiasm is divided by a sagittal section (s s, Fig. 269) into a rightand left half, all the decussating fibers are severed, while the non-decussatingbundles remain intact. Since the decussating bundle supplies the innerhalves (I and r{) of the two retinae these portions of the retina would bethrown out of use, and thus the outer temporal half of the two visual fieldswould be suppressed. This form of visual disturba

---

Text-book of ophthalmology . DISEASES OF THE OPTIC NERVE 613 to the central side of the chiasm and upon the same side as the blind halfof the retina. [But see pages 615, 616.] If the chiasm is divided by a sagittal section (s s, Fig. 269) into a rightand left half, all the decussating fibers are severed, while the non-decussatingbundles remain intact. Since the decussating bundle supplies the innerhalves (I and r{) of the two retinae these portions of the retina would bethrown out of use, and thus the outer temporal half of the two visual fieldswould be suppressed. This form of visual disturbance is therefore calledtemporal (or bitemporal) hemiopia (Fig. 273). It occurs, for instance, whenL B. n n

---

Size: 1612px × 1550px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: ., bookcentury1900, bookdecade1910, booksubjecteye, booksubjectophth