The SpecialEyes Arc Length Calculator is a resource for eye-care practitioners and contact-lens fitters to design their own SpecialEyes custom contact lenses utilizing a sagittal depth fitting philosophy. The contact lens calculator includes design software for toric, sphere, and multifocal contact lenses, as well as an over-refraction cross-cylinder calculator to determine resultant Rx after a successful in-office over-refraction is performed.
How to Design a Contact Lens Using the Arc Length Calculator:
Watch the Arc Length Calculator Demo
The toric contact lens calculator features a simple plug-and-play design, so feel free to experiment with it. When entering your values into the calculator, use the tab key, enter key, or mouse to move your cursor throughout the fields. Once all fields are complete click the “Calculate” button to initiate the calculation. If you have any questions, please call us at 866-404-1060 or chat with us!
Information is provided as a guideline only to assist in the contact lens fitting process.