Technologies for controlling vision correction of a wearable computing device includes controlling an opacity of an adjustable lens of the wearable computing device to generate a viewing port through the adjustable lens such that a region defined by the viewing port has an opacity less than a remaining region of the adjustable lens. For example, the opacity of the adjustable lens may be increased except for the region defined by the viewing port. In use, the wearable computing device may adjust the location, size, and/or shape of the viewing port based on a predefined prescription, the direction of the user's gaze, the user's viewing context, and/or other criteria. Additionally or alternatively, an image may be displayed on an external display surface of the adjustable lens. The wearable computing device may include multiple adjustable lens, each of which may be controlled in a similar manner.