| 摘要 |
An apparatus for measuring pupillary height of a pupil of a patient relative to a spectacle frame includes a housing having a distal end defining at least one target aperture. The housing has a proximal end opposite the distal end. A eye-piece is disposed toward the proximal end and permits an operator to observe the pupil of the patient through the target aperture such that the eye-piece, the target aperture, the spectacle frame, and the pupil of the patient are in operative alignment. Also included is a means for establishing and maintaining the housing at a fixed position relative to the spectacle frame, and an adjustable lower platform operatively coupled to the housing and vertically displaceble relative thereto. The lower platform is configured to engage a bottom edge of the spectacle frame. A measuring scale is operatively coupled to the lower platform such that vertical displacement of the lower platform causes corresponding vertical displacement of the measuring scale. The measuring scale is disposed in a fixed vertical relationship relative to the lower platform such that the measuring scale is displaced relative to the pupil of the patient when the lower platform is displaced to contact the bottom edge of the spectacle frame. A horizontal reference marker adjacent to the measuring scale is configured to be aligned with a center of the pupil and intersects the measuring scale. The operator aligning views the pupil of the patient through the eye-piece and aligns the horizontal reference marker with the center of the pupil such that the measurement of the pupillary height is determined by the intersection of the horizontal reference marker relative to the measuring scale.
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