Patent ID: 8353852
Filing Date: 2013-01-15
Classification: A61F

Abstract:
1. An ophthalmic sizing be for use in determining a correct size of a bypass tube required in tear-duct surgery, said ophthalmic sizing tube consisting of a cylindrical tubular element having a longitudinal length, the tabular element defining a lumen, and the tubular element defining a flanged end at one end of the tubular element, the remaining length of the tubular element distal to the flanged end having a series of ruled markings, the series extending longitudinally along the remaining length and towards the flanged end, and the markings being visible by virtue of at least one of: a contrast between color of the markings and color of the remainder of the element over which the markings are located, and the markings being raised or depressed with respect to intervening sections of the tubular element; such that in use the ophthalmic sizing tube may be inserted into a drainage passage made during tear-duct surgery, the drainage passage extending from an eye to a nasal passage, with the flanged end locating at the inner canthus of the eye, the markings within the nasal passage being visible.