Brock's approach to treating eye disorders was crucial in paving the way to overcoming an erroneous but long-standing medical consensus that stereopsis could not be acquired in adulthood but only during a critical period early in life: neuroscientist Susan R. Barry, the first person to have received widespread media attention for having acquired stereo vision in adulthood, attributes him a central role in her recovery of stereopsis, a discovery which in turn influenced the prevalent scientific conceptions with regard to the neuroplasticity of the visual system.
[1] Brock trained his patients with rich stereo images which closely resembled the natural environment, and favored these over the use of (simplified) stereographs.
[2] He made use of the peripheral vision of his patients to lock binocular fusion, using his so-called "stereomotivator" to project large red/green anaglyphic stereo images onto a wall such as to stimulate very large receptive fields in the patients.
[2] Aside the well-known Brock string with which patients practice binocular accommodation and vergence, he frequently used images of red/green anaglyphic rings for diagnosis and training.
[4] Born in Switzerland in 1899, Brock spoke German at first, but switched to English as his main language after he moved to the United States in 1921 at the age of 22.