Figure 6.

Goldmann Visual fields in a 6-year-old child before and after gene therapy. Upper Panel shows visual fields of a 6-year-old child (P4). Before surgery, he was able to give only vague information about the visual field outer limits in both the right (A) and left (B) eye due to severe visual impairment. After surgery, reliable field testing using targets I₁–I₄ and III₄ as well as defining the blind spot was possible in the right eye 6 months after treatment (C). In the left eye, visual field testing using targets I₂, I₃ and III₄ could be performed 8 months after therapy (D). The illustrated isopters correspond to the aforementioned targets and represent contour lines of the hill of vision. Both eyes showed marked enlargement of the visual field after gene therapy.