Same entry in Photius (mu565 Theodoridis) and, earlier, Hesychius (mu1777), with the important proviso that Hesychius gives the headword itself not as mu/ghs but as mu/dhs. The latter could be right if the term means "weeping" eyes (cf. mu 1374, mu 1377). In any event, Theodoridis (above) notes Alberti's view that the correct form of the headword should actually be mu/dh or mu/dhsis.
For (sc. medical) 'incapacity' cf. under alpha 522, alpha 4153.