For me, polarised sunglasses are all about two things: firstly, to maximising my ability to see through the water, either to spot fish or to identify obstacles that could become a hazard to boating; and, secondly, to reflect the strong glare of the tropics whilst not impeding the quality of vision. I have been wearing Tonic Polarised Sunglasses for more than 12 months now and I can only speak highly of them. The clarity of vision is outstanding and they certainly do the job for me when I go fishing."