Ophthalmologic apparatus and image classification method

摘要

A ophthalmologic method and apparatus for processing a captured image of a tear film lipid layer on a cornea of a patient's eye to be examined and for classifying types of dry eye of the patient's eye. The captured image of the tear film lipid layer is processed to measure a movement speed of the tear film lipid layer at the time of opening of the patient's eyelid. The captured image of the tear film lipid layer is further processed to measure a time until the tear film lipid layer is broken up after the patient's eyelid has been opened and a break up region is detected. The type of dry eye of the patient's eye is classified based on the two measurement results.

主权项

1. An ophthalmologic apparatus comprising:
an optical system for projecting an illumination light onto a tear film lipid layer on a cornea of a patient's eye to be examined; imaging means for receiving reflected light from the tear film lipid layer onto which the illumination light is projected and for capturing an image of the tear film lipid layer; first measuring means for processing the captured image of the tear film lipid layer to measure a movement speed of the tear film lipid layer at the time an eyelid of the patient is opened; second measuring means for processing the captured image of the tear film lipid layer to measure a time until the tear film lipid layer is broken up after the patient's eyelid has been opened and a breakup region appears; and classification means for classifying the type of dry eye of the patient's eye based on measurement results from the first and second measuring means and displaying the type of dry eye as a two-dimensional map having one coordinate axis representing the movement speed of the tear film lipid layer at the time the patient's eyelid is opened and the other coordinate axis representing the time until the tear film lipid layer is broken up after the patient's eyelid has been opened and the breakup region appears.