perusal, see
覧 centers on the act of looking over something carefully or broadly: perusing, inspecting, or seeing with attention.
覧 is the modern simplified form of 覽. The older form combines 見 (see) with 監 (oversee), suggesting looking or inspecting. The modern simplification replaces the upper part with a simpler shape.
The bottom 見 means see, and the upper part resembles an eye under a roof, like a supervisor looking over documents. Together, 覧 is perusing or inspecting.
For ラン, imagine running your eyes over a document: run -> ラン, and you peruse it carefully.
look; glance; sight; having a look at; looking over; glancing through; running one's eyes over
inspection; reading; perusal
(please) try to
exhibition; showing; displaying; putting on display
viewing
extensive reading; wide knowledge
sightseeing
circulation (esp. of documents); sending round
preview (of an exhibition); private viewing; preliminary inspection
seat; seats; stands; grandstand; bleachers
world fair; international exposition
outline; summary; survey; handbook
handbook; manual; compendium
(your) perusal; (your) inspection
general survey; looking through; looking over
inspection; unrestricted viewing; reading
imperial inspection
please look at it
to see; to look; to watch
(please) look