I have a prescription for glasses and it reads:

Sphere, cylinder, axis
Plano -0.50 007 that is for (od)

+0.25 -0.50 178 that is for (os)

Please help me understand

I did get your answer

Please be patient. Someone will answer your question.

Please click the following link to understand your prescription:
How to Understand the Numbers on My Eyeglass Prescription | eHow.com (http://www.ehow.com/how_4605299_understand-numbers-eyeglass-prescription.html)

You have a very minimal prescription.

Do you have a specific question?