The typical RX. looks like this:
Or might look like this:
The RX will have either horizontal rows or vertical columns. The top row or the first column is always for the right eye, abbreviated as OD. The second row or column will always be for the left eye, abbreviated as OS. (You need an RX written specifically for eyeglasses; the RX for contact lenses won't work for eyeglasses!)
Each row of the RX has three main sections: the sphere (SPH), the cylinder (CYL) and the axial. The SPH segment corrects a short-sighted or far-sighted vision. The CYL and axis sections are correct for astigmatism.
There may also be a fourth section of the RX, NV-add, which could be used to order a pair of bifocal or progressive glasses with a close-up vision section in the lower part of the lens.