Guide to Choosing Prescription Goggles

SWANS makes prescription goggles for short and long-sighted swimmers.  We advise all swimmers to seek the assistance of an optician to help choose the correct prescription.

In order to calculate the correct prescription, use the formula:

Dioptre = Sph + (Cyl / 2)

For example, if you had the prescription in the table below you would need:

• Right eye = -2.0 + (-1.0 / 2) = -2.5

• Left eye = -2.5 + (-2.0 / 2) = -3.5

Eye	Sph	Cyl	Axis
Right	-2.00	-1.00	010
Left	-2.50	-2.00	010

 

If your dioptre falls between two of the options on offer, always move down to the next available dioptre. For example, if your prescription is -3.75 then move down to -3.5.