Present in most species
They are usually present. The lower lid is movable, moving upwards to close the eye; in some lizards, this lid might be transparent, allowing vision even when the lids are closed.
In some chameleon species as well as some geckos and the oscellated skink (Ablepharus sp.) the eyelids have fused.
In chameleons, the upper and lower eyelids are joined, with only a pinhole large enough for the pupil to see through.
All geckos, excluding the Eublepharidae family (Leopard gecko), lack eyelids and instead have a transparent membrane, which they lick to clean.