+ Smaller as their distance from the observer increases.
+ Foreshortened: the size of an object's dimensions along the line of sight are relatively shorter than dimensions across the line of sight.
A small collection of analogue photos about perspective below will help us more understanding.
|Into the Distance by homatthew|
|Doubletree Holga by [ kasari ]|
|The Infinite by Andrés Medina|
|live in square by Jen Son|
|Armored Wall by SychiO|
|Hole in the Sky by Kenneth Ipcress|
|. by Stephen Edwards.|
|Amtrak Maintenance Yard 2 by tobysx70|
|Perspective by Thomas Tissot|
|Blurred Lines - Yeah I know. by marq4porsche|