Lewis & Short

scŏtōmătĭcus, a, um, adj., = σκοτωματικός, of or belonging to dimness of vision: passio, Cael. Aur. Tard. 1, 2.
Hence, subst.: scŏtōmătĭcus, i, m., a dim-sighted person, Scrib. Comp. 99; Theod. Prisc. 2, 3.