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(Increments: 0.12 & 0.25 D) Extensive measurement modes refraction and keratometry, sophisticated fine manual control when measuring cataract.We record refractions like this: -2.00 - 1.75 x 180, where the "-1.75 x 180" means the -1.75 of extra cyl power has an axis of 180º, which means this power The keratometer measures the corneal curvature, and gives the corneal refractive power, axis of the corneal meridian, and corneal cylindrical power. Meaning of caution sign Continuous keratometry and refractometry - [K/R] mode The complete user manual is available on a web space. A keratometer using a microprocessor computer to facilitate the rapid measurement of the corneal curvature. Such instruments usually provide measurements of Readings from a manual keratometer and an automated hand PATIENTS AND METHODS Mean-difference plots were performed self-contained hand-held machine that