Aqualung Look 2 Corrective Lens, Brand new.

Description

Brand new corrective diopters for the Aqualung Look 2 masks. There are many options available. Easy to install.
If you wear glasses or corrective lenses, make the beautiful underwear world even clearer with Look 2 Diopter lenses.
Comes from smoke free, pet free environment.
Negative diopters fit both left and right side, they are interchangeable.
Determining the correct diopter:
Refer to the eye glass prescription. Decoding the prescription is not as difficult as it might first appear. "Oculus dexter" (OD), "oculus sinister" (OS) and "oculus utrique" (OU) are Latin terms that mean right eye, left eye and both eyes. Sphere is the amount of correction needed in each eye. Cylinder is the amount of astigmatism.
Locate the sphere number and the cylinder number for the OD and OS. These numbers will likely be different for each eye.
Choose the numbers for one eye and calculate the diopter. Add the sphere number and half of the cylinder number to determine the diopter. For example, if the prescription indicates a sphere of 2.0 and a cylinder of -.50 this would be calculated as 2.0 - .25 = 1.75.
Round down when possible, because water is a natural magnifier. Diopters are in increments of .25. In the example, a diopter of 1.5 would be chosen.