ONGUARD A-2 SG301 PRESCRIPTION SAFETY GLASSES, METAL FRAME

In order to add any lens options, you must select a Lens Type OTHER than "Frame Only".

Single vision occurs when an individual is near sighted or far sighted, but not near sighted and far sighted.

A lens with two points of focus - usually one for distance and one for near vision. Bifocal portion of lens is in the shape of a half moon.

A no-line multi-focal lens that includes all corrections, from distance to close-up, in one lens without any separation of the visual zones by a line.

Anti-reflective coatings eliminate the distracting glare that can be produced by light when it reflects through your lenses. Anyone subjected to direct or indirect reflections – especially those who spend a lot of time around computers and electronic monitors of any type, suffer from eye strain, or who drive at night – will likely enjoy the benefits of glare reduction. Due to the high reflective properties of high index lenses, an anti-reflective coating is recommended, and is practically mandatory for high index lenses made of glass. (Note: AR coating is not good for outside glasses, dusty dirty environments and or constant cleaning.) The lenses must be wet before they are cleaned.

Hydrophobic anti-fog coatings are soap-based and work by repelling and spreading the fog moisture as it hits the lens.