What shape is my peripheral vision border?
The outer boundaries of peripheral vision are determined by which quadrant of the visual field you are in [2,3]. Peripheral vision is the part of our vision that is outside the center of our gaze, and it is the largest portion of our visual field [2]. There are several different types of eyes that range in shape from hooded to upturned to deep-set [1]. The shape of your peripheral vision border is determined by the shape of your eyes [1]. 
Peripheral vision is vision as it occurs outside the point of fixation, i.e. away from the center of gaze or, when viewed at large angles, in the far peripheral vision [1,2,4]. Peripheral vision is the part of our vision that is outside the center of our gaze, and it is the largest portion of our visual field [2]. The inner boundaries of peripheral vision can be defined in any of several ways depending on the context [4]. In everyday language the term "peripheral vision" is often used to refer to what in technical usage would be called "far peripheral vision" [4]. This is vision outside of the range of stereoscopic vision [4]. It can be conceived as bounded at the center by a circle 60° in radius or 120° in diameter, centered around the fixation point, i.e., the point at which one's gaze is directed [4]. However, in common usage, peripheral vision may also refer to the area outside a circle 30° in radius or 60° in diameter [4]. In vision-related fields such as physiology, ophthalmology, optometry, or vision science in general, the inner boundaries of peripheral vision are defined more narrowly in terms of one of several anatomical