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Keratometer suppliers and exporters |
The modern keratometer uses optical sensors and computerized technology to measure comparisons and contrasts of the cornea against a predetermined value. The values determined by the keratometer are called keratometric values and enable eye care professionals to determine the presence and degree of astigmatism. There are two types of astigmatisms: the most common is a misshapen cornea, but sometimes the lens, located behind the cornea, can be misshapen. A normal cornea is spherical, but in the case of astigmatism, the cornea is oblong.
The keratometer measures the cornea at different meridians and helps determine a proper corrective prescription, the degree of correction, and whether concave or convex lenses are required to restore vision to an acceptable level.
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