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GENERAL INFORMATION ON USAGE AND MAINTENANCE
OPERATION PRINCIPLE
Photography of the corneal endothelium:
Slit light is projected from oblique direction to a patient's eye, and corneal endothelial cells are photo-
graphed with the CCD camera optically installed in a diagonal. Image processing of the photographed
corneal endothelial cells is carried out, the boundary of a cell is detected, and the area (Cell density
(CD), Minimum cell area (MIN), Maximum cell area (MAX), Average cell area (AVG), Standard devia-
tion of cell area (SD), Coefficient of variation (CV) and cell area histogram) and the form (Frequency of
hexagon cells (HEX) and form histogram (angle of cell)) are computed.
The boundary line of cell can be corrected (adding, deleting and modifying e.g.) by manual operation.
Cornea thickness measurement:
The slit light is projected onto the patient eye at a slant.
The corneal thickness is measured by processing reflected light from the corneal surface and back,
which is received by line sensor that is optically installed in a diagonal.
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