Derivational etymology which in its principle is identical with Herodian's (see ὀφρύς / ὁράω) but starts from a ghost-form of the same verb, ὄπτω, meant to account for the future ὄψομαι, the perfect ὄπωπα and a few nominal derivatives (ὄψις, ὀπτός, ὤψ…). It requires a formal manipulation, a change of /p/ into /ph/, which is explicit. From the semantic point of view, it poses the same problem as Herodian's: a derivation from "to see" can provide the etymology of "eye", not of "brow". A different derivation path is used in the Etym. Magnum: from ὄπτω is derived an aspirate perfect ὦφα of the εἴληφα type, and then a /r/ is inserted. Eustathius preserves a compositional etymology with the same ὄπτω (see ὀφρύς / ὄπτω + ῥύομαι)