| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a cornea shape analysis apparatus capable of non-invasively measuring the variation in time of a lacrimal liquid layer on the surface of a cornea and analyzing the cornea quantitatively for observing a dry-eye symptom, estimating the extent of the symptom and determining the diagnosis. <P>SOLUTION: An arbitrary pattern is projected on a cornea of a subject, and the reflection of the pattern from the cornea is photographed. In the measurement, the subject is made to blink once to form a homogeneous lacrimal liquid layer on the surface of the cornea. After that, the opened state of the eyelid is maintained for about 10 seconds, while a plurality of images of the pattern of reflection from the cornea are recorded in a digital memory in time series at arbitrarily determined time intervals. Then, the interrelation between an initial image just after the opening of the eyelid as a standard and the images photographed at arbitral time intervals is calculated based on the data recorded in the digital memory. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
