The reticle is illuminated by an electronic light source (an incandescent light bulb or, more recently, a light-emitting diode) or by ambient light gathered behind the reticle via an opalescent window or fiber optic light pipe.
In Plain Sight | Telescopic sight | telescopic sight | Sight & Sound | Reflector sight | Out of Sight | Line-of-sight propagation | sight | No End in Sight | line-of-sight propagation | Front Sight Firearms Training Institute | Fight for Sight | At First Sight | The Sight Below | The Sensation of Sight | Shoot on Sight | reflector sight | Out of Sight (TV series) | Out of Sight (1998 film) | Love at first sight | love at first sight | line-of-sight | Hide in Plain Sight | Drowning with Land in Sight | Collimator |