What is the ANSI standard for cylinder power up to 2.00D?

The ANSI standard for cylinder power up to 2.00D is indeed 0.13D. This value is established to ensure accuracy and consistency in measurements of cylindrical lenses, which are used to correct astigmatism. The standard specifies the acceptable tolerance for cylinder power, which is critical for ensuring that the lenses manufactured meet the visual needs of the patient.

When working with cylinder powers in the range up to 2.00D, the 0.13D tolerance allows for a precise fit in vision correction, ensuring that small variances do not significantly impact a patient's ability to see clearly. Standards like this are essential in the optical field to maintain a baseline of quality and reliability across different optical products and practices.

The adoption of such a standard helps in assessing the accuracy of the prescription lenses created, allowing opticians to provide patients with corrective options that are adequately tailored to their specific visual requirements.