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What does my eyeglass prescription mean?

I need help interpreting the meaning of my eye prescription. Are these two prescriptions the same in strength and acuity or is one stronger? I have slight difficulty reading signs in a distance and I occasionally have distorted vision when reading close up, depending on the font size. I have concerns about filling an Rx that is inadequate for my needs.
New prescription
OD SPHERE  -1.00 CYL +1.00 AXIS 30 ADD +1.75
OS SPHERE -0.25 SPHERE                   ADD +1.75

My previous prescription
OD SPHERE -.50 CYL -.75 AXIS 110 ADD +1.75
OS SPHERE -0.50 CYL -0.75 AXIS 110 ADD +1.75
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177275 tn?1511755244
One RX First is written in PLUS CYLINDER the second is written as MINUS CYLINDER.   Think of it as your weight in pounds and your weight in kilograms. they will look very different numbers but your weight is the same. What I cannot tell you is what your vision is with each pair or anything about the health of your eye.  Having said that there is a fairly big change in the left eye (OS). You will need to discuss this with the "doctor" that prescribed the new pair.
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177275 tn?1511755244
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