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SPECIFICATIONS AND PERFORMANCE
OPERATION AND PRINCIPLE OF OPERATION
Refraction (REF)
The instrument projects a near infra red ring of light onto the retina and the reflection of the
ring is captured by a CCD camera. An internal computer analyzes the image and calculates
the spherical, cylindrical and axial values.
Keratometry (KRT)
The instrument projects a near infra red ring of light onto the cornea and the reflection of the
ring is captured by a CCD camera. An internal computer analyzes the image and calculates
the curvature radius, corneal astigmatic axis and the corneal refractive values.
The KR-1 projects a luminous flux (near-infrared light) for refractive measurement to retina,
the reflected image is received by a CCD camera, and the spherical refractive power, cylindri-
cal refractive power and the axis of astigmatism are determined through computation.
The KR-1 performs corneal curvature measurements by projecting a kerato-ring to the cornea,
which receives the reflected image by a CCD camera from the cornea surface, and deter-
mines the curvature radius, corneal astigmatic axis angle and the corneal refractive power.
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