Hertel type; has two footplates (or yokes) which fit over the bony temporal margin of the lateral orbital rim - one yoke is fixed and the other slides; uses biocular reading (distance between the 2 lateral orbital rims) to establish a baseline; uses the position of the corneal apex to determine the position of the globe within the orbit
NSN 7035-01-071-0197
NSN 5950-01-267-8486
NSN 5999-01-176-8441
NSN 2925-01-464-8392
NSN 5910-00-816-9909
NSN 6130-00-170-4844
NSN 5930-01-388-0865
NSN 6610-01-041-0555
NSN 6320-00-422-9006
NSN 5930-01-550-4012
NSN 5895-00-542-2019
NSN 5915-01-567-6723