Watch provided with a control member

A watch comprising a case, which includes a middle (5), an horological movement inside the middle, and a control member (1) defining a central axis (12) and mounted laterally with respect to the middle, the watch being provided with at least one electronic feature;

• characterised in that:
• the control member (1) includes an optical guide (15) comprising a proximal face (16) close to the middle and a distal face (17) distant from the middle, said optical guide making it possible for the transmission of optical signals between the distal face thereof and the proximal face thereof, the distal face (17) being arranged such that a user can touch it with their finger (35),
• the watch is provided with at least one light source (18) capable of illuminating at least one portion of the distal face (17) through the optical guide (15),
• the watch is provided with an imaging device comprising a photodetector (19) and arranged to be able to produce, when the light source (18) is active, an image of a portion of a finger (35) of a user which is located at the level of the distal face (17) of the optical guide (15) in a detection zone, spatially determined and fixed relative to the middle (5),
• the watch includes a processor configured to be able to receive from the photodetector (19), a plurality of successive digital images of portions of said finger which are located successively in said detection zone, to be able to process this plurality of digital images so as to detect a movement of said finger relative to said detection zone, and to be able to generate a command which manages said electronic feature of the watch based on said movement of the finger.