When reading a pair of glasses on the manual lensometer what should be read first?

When reading a pair of glasses on a manual lensometer, you should first focus on the sphere power, which indicates the main prescription for nearsightedness or farsightedness. After determining the sphere, check the cylinder power and axis if the prescription includes astigmatism. Lastly, confirm any additional parameters, such as prism and addition power for bifocals or progressives, if applicable.