Understanding a glasses prescription can be tricky at first! Typically, you'll see terms like OD (right eye) and OS (left eye) with numbers indicating "sphere" for nearsightedness or farsightedness, "cylinder" for astigmatism, and "axis" for lens orientation. Are you trying to interpret your own prescription, or are you just curious about the terms? Feel free to share more context, and I can help unpack it further!