Cyclopentolate is a medication that is used to dilate the pupils and prevent the eye from focusing. It is important to ensure that the medication is pure and free from impurities that can affect its efficacy and safety. Cyclopentolate impurities are any unwanted substances that may be present in the medication and can include degradation products, residual solvents, and other contaminants. These impurities can affect the stability, quality, and safety of the medication, which is why it is important to monitor and control them during the manufacturing process.