Cambridge stimulator treatment for amblyopia. An evaluation of 80 consecutive cases treated by this method.

Eighty consecutive patients with amblyopia ex anopsia were treated with the Cambridge Stimulator (Cam). Each patient received an average of six, 15 minute treatment sessions at a frequency of 1-2 per week. Treatment was terminated after two consecutive treatments indicated no change in visual acuity. Sixty-nine patients were given minimal occlusion simultaneously with Cam. treatment. Eleven patients were given full-time conventional occlusion simultaneously with Cam. treatment. Of the first group, 47% achieved 6/12 or better visual acuity, although if the 14 eccentric fixators were excluded, 60% achieved 6/12 or better visual acuity. Of the second group, 91% improved to 6/12 or better vision. This means the patients treated with full-time occlusion and Cam. showed an improvement of visual acuity of nearly twice the extent of those patients with minimal occlusion and Cam. over the same period of time.