Refractionist _YasirButt on Instagram: "Read the caption 👇👇👇👇👇 Lensometer 👇👇👇👇 A lensometer (also called a lensmeter or focimeter) is an optical instrument used in optometry to measure the power of spectacle lenses. 👓 What does a lensometer measure? It helps determine: Spherical power (SPH) Cylindrical power (CYL) Axis of astigmatism Prism power (if present) Add power in bifocal/progressive lenses Optical center of the lens Why is a lensometer used? To verify spectacle prescriptions To
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