Optometrists write in minus cylinder form (makes for smaller, thinner lenses), while ophthalmologists write in plus cylinder form (which translates into "surgical" talk). These prescriptions are actually almost the same. Go to a calculator online for "converting plus to minus cyliner."
Best of luck,
Timothy D. McGarity, M.D.
Converting Minus to Plus Cylinder:
Add the magnitude and power of the cylinder to the sphere = New sphere power, then keep the magnitude of the cylinder the same, but change it's power to plus and rotate the axis by 90 degrees:
Your right eye:
-2.25 sph (+) -0.25 cyl =-2.50 sph ("new sphere")
-0.25 cyl 150 axis = +0.25 cyl 60 axis ("new cylinder in plus form")
-2.50 sph +0.25 cyl 60 axis
Copyright 1994-2018MedHelp.All rights reserved. MedHelp is a division of Vitals Consumer Services, LLC.
The Content on this Site is presented in a summary fashion, and is intended to be used for educational and entertainment purposes only. It is not intended to be and should not be interpreted as medical advice or a diagnosis of any health or fitness problem, condition or disease; or a recommendation for a specific test, doctor, care provider, procedure, treatment plan, product, or course of action. MedHelp is not a medical or healthcare provider and your use of this Site does not create a doctor / patient relationship. We disclaim all responsibility for the professional qualifications and licensing of, and services provided by, any physician or other health providers posting on or otherwise referred to on this Site and/or any Third Party Site. Never disregard the medical advice of your physician or health professional, or delay in seeking such advice, because of something you read on this Site. We offer this Site AS IS and without any warranties. By using this Site you agree to the following Terms and Conditions. If you think you may have a medical emergency, call your physician or 911 immediately.