Colored Contact Lens Size Guide | DIA, Graphic Diameter & BC
Colored contact lens listings often show several measurements. DIA, graphic diameter and base curve describe different things, so they should not be treated as interchangeable.
DIA is the overall lens diameter
DIA is the full diameter of the contact lens in millimeters. It is a lens specification and should be considered together with the fitting guidance for the product.
Graphic diameter affects the visible color area
Graphic diameter describes the approximate width of the printed or colored design. A larger graphic diameter can create a more enlarging visual effect, while a smaller one can look more subtle, but the result also depends on the design and your iris.
Base curve is about lens shape and fit
Base curve describes the curvature of the lens. Do not use a visual size preference to replace fitting guidance. If you are unsure which base curve or diameter is appropriate, ask an eye-care professional.
Frequently Asked Questions
Is graphic diameter the same as DIA?
No. DIA is the overall lens diameter; graphic diameter refers to the visible printed color area.
Does a larger DIA always make eyes look larger?
Not necessarily. The graphic pattern and graphic diameter usually have more direct influence on the visible enlarging effect.
