Fig. 5

Biofeedback fixation training of four patients undergoing surgical alignment of the strabismus (Patients 1 = C, 2 = A, 3 = B, and 4 = D in Table 1). Fixation stability (P1 = red symbols and P2 = blue symbols) recorded during each training session. BCDVA (open triangles) examined during the training period for each of the four trained patients. y-axes at the left show BCDVA and at the right fixation stability. Fixation stability improved for all subjects. The training was interrupted earlier in one of the subjects (D) since 100% fixation stability was achieved with 1.0 BCDVA