Abstract: A computer system displays a first object that includes at least a first portion of the first object and a second portion of the first object and detects a first gaze input that meets first criteria, wherein the first criteria require that the first gaze input is directed to the first portion of the first object in order for the first criteria to be met. In response, the computer system displays a first control element that corresponds to a first operation associated with the first object, wherein the first control element was not displayed prior to detecting that the first gaze input met the first criteria, and detects a first user input directed to the first control element. In response to detecting the first user input directed to the first control element, the computer system performs the first operation with respect to the first object.

Abstract: A computer implemented method includes receiving eyewear parameters to form received eyewear parameters. A current computer model of eyewear is modified in accordance with an eyewear parameter that necessitates alteration of the current computer model to form a new computer model of the eyewear. The new computer model of the eyewear includes an altered hierarchical set of interconnected elements defining a rig and an altered surface representation around the rig defining a mesh that is manifold. The modifying operation is repeated for each eyewear parameter of the received eyewear parameters that necessitates alteration of the new computer model to form an output manifold mesh. Bespoke eyewear is manufactured from the output manifold mesh.