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 5945-01-423-9086
NSN 5905-01-246-6824
NSN 5835-01-526-8854
NSN 5998-00-222-1248
NSN 5960-00-879-7478
NSN 6150-00-347-0520
NSN 6220-00-477-5946
NSN 5985-01-403-2835
NSN 5905-01-445-0366
NSN 6145-01-110-4219
NSN 5920-01-475-4892
NSN 5975-01-167-7952