A digital measurement system and method for optical applications including a mobile client device having a digital camera and an audio port, and a laser measurement device having a laser and a magnetic card reader. The laser measurement device and the magnetic card reader are electrically connected to the audio port of the mobile client device. The mobile client device is configured to activate the laser at the same time as the digital camera is activated, capture an image of a patient, and calculate position of wear measurements based on a location of a laser mark in the captured image. The mobile client device also allows an order for a frame and lenses to be submitted to a ophthalmic laboratory, and payment transactions to be processed using the magnetic card reader.
