UV400 and polarised sunglasses for Dar es Salaam sun, with or without a prescription.

Strong equatorial sun is hard on the eyes. Our sunglasses block UV rays and polarised lenses cut the glare off water and roads. Pick a style off the rack, or have your prescription put into sun lenses.
Yes. We can make most prescriptions into tinted or polarised sun lenses.
It means the lens blocks ultraviolet light up to 400 nanometres, which covers both UVA and UVB.