We prove a highly uniform stability or "almost-near" theorem for dual lattices of lattices $L \subseteq \Bbb R^n$. More precisely, we show that, for a vector $x$ from the linear span of a lattice $L \subseteq \Bbb R^n$, subject to $λ_1(L) \ge λ> 0$, to be $\varepsilon$-close to some vector from the dual lattice $L'$ of $L$, it is enough that the inner products $u\,x$ are $δ$-close (with $δ< 1/3$) to some integers for all vectors $u \in L$ satisfying $\| u \| \le r$, where $r > 0$ depends on $n$, $λ$, $δ$ and $\varepsilon$, only. This generalizes an earlier analogous result proved for integral vector lattices by M. Mačaj and the second author. The proof is nonconstructive, using the ultraproduct construction and a slight portion of nonstandard analysis.