The lens is attached to the housing with a silicone sealant bead, so don't pry on it or you'll have to re-seal it...there is a little metal spring clip on the back of the housing, which you have to release (it's under the black rubber cover). Then you can remove the bulb from the rear of the housing, and replace.
G'luck.
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1990 5spd V6 Camry (Still kicking at 393,000km) 1991 Celica GTS -- Pappa needs a 3SGTE...and AWD for all this friggin' snow
Honda my A$$, you just can't kill a Yota...