horror fusionis

hor·ror fu·sio·'nis

simultaneous projection into consciousness of retinal images so different that fusion is impossible. Synonym(s): macular evasion [L., dread of intermingling]

horrorfusionis

Avoidance of fusion resulting from two retinal images which are so different that they are impossible to fuse. This is often the case in strabismus. Syn. fusion aversion.