The diameter is printed on the blister and your lens prescription as DIA. Here are all contact lenses with 14.5 mm, sorted by lens type – with the base curve (BC) of each lens so you can match both values on your blister.
No lens matches this selection.
The same diameter alone does not make a lens suitable: base curve, material and edge design all affect the fit. If you want to change products, have the fit of the new lens checked by your optician – contact lenses are medical devices. The list shows which lenses are available in 14.5 mm and what they cost.
The diameter (DIA) is the total width of the lens from edge to edge in millimetres. Soft lenses usually range from 13.8 to 14.5 mm so that they cover the cornea completely; 14.5 mm is a common value within that range. During fitting the diameter is chosen together with the base curve so that the lens sits centred and moves slightly with each blink.
Every blister and box shows the diameter as DIA (for example “DIA 14.5”), next to the base curve as BC and the power as PWR or D. The same values are on the lens prescription you received at your fitting. All lenses on this page have DIA 14.5; each card shows the base curve, and you can narrow the list down by it.
Both values describe the fit: the base curve gives the curvature of the back surface, the diameter the size of the lens. A flatter base curve fits looser at the same diameter, a larger diameter fits slightly tighter at the same base curve. That is why the two values are always fitted as a pair – and why this page shows the base curve of every lens.
More about the diameter of contact lenses
Diameter and base curve come from the fitting at your optician. Convert the power from your spectacle prescription with the prescription calculator.
