stereophorometer

ster·e·o·pho·rom·e·ter

(ster'ē-ō-fō-rom'ĕ-ter),
A phorometer with a stereoscopic attachment.

stereophorometer

(stĕr″ē-ō-for-ŏm′ĕ-tĕr) [″ + phoros, a bearer, + metron, measure]
A prism-refracting device for use in correcting extraocular eye muscle imbalance.