• A curved, hinged ruler for measurement along the surface of the globe during strabismus surgery has been designed. A modification of a previously described curved ruler, the current model has a hinge for greater ease of maneuverability and a "T" piece on one end to facilitate measurement and marking of both poles of the muscle without repositioning the ruler.
Drack A, Scott WE. A Curved, Hinged Ruler for Measurement Along the Globe. Arch Ophthalmol. 1992;110(8):1175. doi:10.1001/archopht.1992.01080200155046