On a watch prescription, ‘PL’ usually stands for Plano. This time period signifies that no corrective energy for sphere (SPH) is required for that eye. In essence, the lens wanted is flat or has zero refractive energy. For example, a watch prescription may listing “OD: PL,” that means the proper eye requires no spherical correction.
The presence of Plano on a watch prescription is critical because it specifies that the person’s imaginative and prescient for that eye is already on the desired stage with out the necessity for lenses to right nearsightedness or farsightedness. Traditionally, eye prescriptions have advanced to exactly talk the lens traits required for optimum imaginative and prescient correction, with phrases like Plano offering readability for each the optician and the affected person. Recognizing this time period ensures that solely the required corrective measures are applied, stopping over-correction.