By using the ‘BASE-9 GLASS’ technology, it is possible to fit the optical inside clip (model No. J-SP200) flat on and therefore at right angles to the viewing axis. This prevents undesirable optical aberrations such as oblique astigmatism.
The sports sunglasses inside clip concept was developed so as to take the same optical correction into account that you have in your spectacles. This means that the eye does not have to adjust when using the corrective clip.
The optical corrective clip was designed for use on all JILL sports sunglasses. The ideal accessory for athletes requiring optical lenses. The clip is extremely stable and yet very lightweight, thin and, thanks to the specially designed front of the frame, practically invisible from the outside.