A wearable display system comprising: a display; an eye imaging camera configured to capture an image of an eye of a user; non-transitory memory configured to store executable instructions; and a hardware processor in communication with the display, the eye imaging camera, and the non-transitory memory, the hardware processor programmed by the executable instructions to: obtain a camera calibration; obtain or determine, using stereoscopic or multiscopic images of the eye of the user and fitting the corneal and scleral regions of the stereoscopic or multiscopic images to spherical models, physiological parameters of the eye in a three-dimensional coordinate frame of the eye, wherein the physiological parameters comprise: a radius (Rc) of a corneal sphere comprising a cornea of the eye, a radius (Ri) of an iris of the eye, and a distance (dp) between a center of the corneal sphere and a center of a pupil of the eye; receive the image of the eye, the image comprising at least a portion of the cornea of the eye and a portion of the iris of the eye; determine an intersection between the corneal sphere and the sclera by determining a plurality of intersection points between the corneal sphere and the sclera; convert, based at least in part on the camera calibration, the plurality of intersection points from the coordinate frame of the eye to a coordinate frame of the image of the eye; and determine the limbic boundary based on the plurality of intersection points by fitting a curve to the plurality of intersection points. a display; an eye imaging camera configured to capture an image of an eye of a user; non-transitory memory configured to store executable instructions; and a hardware processor in communication with the display, the eye imaging camera, and the non-transitory memory, the hardware processor programmed by the executable instructions to: obtain a camera calibration; obtain or determine, using stereoscopic or multiscopic images of the eye of the user and fitting the corneal and scleral regions of the stereoscopic or multiscopic images to spherical models, physiological parameters of the eye in a three-dimensional coordinate frame of the eye, wherein the physiological parameters comprise: a radius (Rc) of a corneal sphere comprising a cornea of the eye, a radius (Ri) of an iris of the eye, and a distance (dp) between a center of the corneal sphere and a center of a pupil of the eye; receive the image of the eye, the image comprising at least a portion of the cornea of the eye and a portion of the iris of the eye; determine an intersection between the corneal sphere and the sclera by determining a plurality of intersection points between the corneal sphere and the sclera; convert, based at least in part on the camera calibration, the plurality of intersection points from the coordinate frame of the eye to a coordinate frame of the image of the eye; and determine the limbic boundary based on the plurality of intersection points by fitting a curve to the plurality of intersection points. obtain a camera calibration; obtain or determine, using stereoscopic or multiscopic images of the eye of the user and fitting the corneal and scleral regions of the stereoscopic or multiscopic images to spherical models, physiological parameters of the eye in a three-dimensional coordinate frame of the eye, wherein the physiological parameters comprise: a radius (Rc) of a corneal sphere comprising a cornea of the eye, a radius (Ri) of an iris of the eye, and a distance (dp) between a center of the corneal sphere and a center of a pupil of the eye; a radius (Rc) of a corneal sphere comprising a cornea of the eye, a radius (Ri) of an iris of the eye, and a distance (dp) between a center of the corneal sphere and a center of a pupil of the eye; receive the image of the eye, the image comprising at least a portion of the cornea of the eye and a portion of the iris of the eye; determine an intersection between the corneal sphere and the sclera by determining a plurality of intersection points between the corneal sphere and the sclera; convert, based at least in part on the camera calibration, the plurality of intersection points from the coordinate frame of the eye to a coordinate frame of the image of the eye; and determine the limbic boundary based on the plurality of intersection points by fitting a curve to the plurality of intersection points.