  A Simpson-Visser spacetime has two nonnegative parameters $a$ and $m$ and its
metric is correspond with (i) a Schwarzschild metric for $a=0$ and $m\neq0$,
(ii) a regular black hole metric for $a<2m$, (iii) a one-way traversable
wormhole metric for $a=2m$, (vi) a two-way traversable wormhole metric for
$a>2m$, and (v) an Ellis-Bronnikov wormhole metric for $a\neq0$ and $m=0$. The
spacetime is one of the most useful spacetimes for the purpose of
comprehensively understanding gravitational lensing of light rays reflected by
a photon sphere of black holes and wormholes. We have investigated
gravitational lensing in the Simpson-Visser spacetime in a strong deflection
limit in all the nonnegative parameters of $a$ and $m$. In a case of $a=3m$,
two photon spheres and an antiphoton sphere at the throat degenerate into a
marginally unstable photon sphere. The deflection angle of the light rays
reflected by the marginally unstable photon sphere at the throat diverges
nonlogarithmically in the strong deflection limit.
