Ordering prescription glasses online requires accurate information about your lens power. You can obtain this information by visiting an optometrist and getting a comprehensive eye exam. The eye exam will determine your precise prescription, including the lens power needed for each eye.nnOnce you have your prescription, you can confidently order glasses online, selecting the appropriate lens power and any additional options or preferences. It's essential to double-check all the details before placing your order to ensure the correct lenses are provided.