Contact Lens Conversion Chart
Contact Lens Conversion Chart. Efron grading scales Multifocal calculator Vertex. Enter the power of your contact lens in the first box.
Hold a ruler in front of the person to be measured and have them look straight ahead. Contact Lens Spectrum® is the most respected source of clinical contact lens information for optometrists, opticians and ophthalmologists. ToriTrack Calculator Convert your eyeglass power into contact lens power Use Lenskart's power calculator to help you find the right contact lens power by providing your eyeglass power.
The tools and contact lens calculators below* are designed to help you maximise fitting effectiveness, patient care and practice efficiency.
Contact lens prescription calculator Easily convert a patient's eyeglasses prescription to the corresponding contact lens parameters.
Converting from one to the other is one of the basic skills opticians must master for contact lens fitting.. If you're nearsighted, you'll notice a negative or minus (-) sign on your prescription, but if you're farsighted, you'll have a positive or plus (+) sign on your prescription. All NCLE prep course and manuals contain a Diopter to Radius conversion chart.
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