Angle indicator for capsular bag size measurement

An angle indicator for measuring the size of a capsular bag of an eye, comprising:

• a compressible, incomplete annulus having a first end, a second end, an interior and an outer surface that remains essentially circular when the incomplete annulus is compressed, the outer surface having a diameter that varies in response to compression of the incomplete annulus;
• a first segment attached to the first end of the incomplete annulus and extending into the interior of the incomplete annulus;
• and
• a second segment attached to both the second end of the incomplete annulus and a distal end of the first segment;
• wherein the first and second segments form an angle, the angle being indicative of the diameter of the outer surface of the incomplete annulus.

An apparatus for measuring the size of a capsular bag of an eye, comprising:

• an angle indicator comprising an incomplete annulus and a pair of arms joined at an intersection therebetween, the arms disposed within the incomplete annulus, the joined arms operably coupled to first and second ends of the angle indicator and configured so that an angle formed by the arms varies in response to a diameter of a capsular bag of an eye;
• and
• a protractor disposed in front of the angle indicator for measuring the angle formed by the arms, the protractor comprising:
• an alignment mark disposed in front of an intersection of the arms of the angle indicator and at least one radial reference edge disposed along one of the arms;
• and
• a plurality of arcuately disposed features located at predetermined angular locations from the at least one radial reference edge.