Anti-fatigue lenses (anti-fatigue lenses)
visual fatigue
When looking at distant objects, the ciliary muscle in our eye relaxes, making the lens thinner; when looking at near objects, the ciliary muscle contracts, making the lens thicker. The main cause of visual fatigue is looking at near objects for a long time, which causes the ciliary muscle to contract continuously.
Anti-fatigue lens
Anti-fatigue lenses are structurally the same as progressive lenses. It has an additional spherical power of ~0.50 diopter at the bottom of the lens. (It is like adding a magnifying power at the bottom of the lens.) When looking at near objects, it can release the contraction required by the ciliary muscle.
Illustration of Hoya Remark Dynamic anti-fatigue lenses
