The disclosure demonstrates an attachment apparatus for optically coupling a mobile device camera to a lens of a medical examination device. The device includes an attachment body wherein the proximal side of the attachment body is attached to a mobile device directly or through a mobile device case. The distal side of the attachment device includes an array of magnets positioned radially around an aperture to align with the eye lens of a medical device wherein at least one pair of axially magnetized magnets of the array are positioned in antiparallel arrangement relative to each other It is understood that axially magnetized magnets positioned in antiparallel relation reduce the expanse of a magnetic field while at the same time increasing the magnetic field strength close to the magnetic poles.