Bifocal Safety Glasses: Dual or Traditional?

Are you in a professional environment where you are exposed to harmful substances or airborne dust or do you use power tools such as angle grinders, band saws, sanders around the home?

Did you know that thousands of eye injuries are recorded in the USA everyday? Over 90% of which could have been prevented had the injured party been wearing safety glasses?

Safety glasses are a see-through safety shield for your eyes. They’re different to regular glasses in that they cover only the front of your eyes, whereas safety glasses cover your eyes from the sides as well so that nothing can enter your eyes and damage them. Safety glasses have passed specific ANSI standards.

Not only the frames of these special glasses are much sturdier than the ordinary glasses, the lenses are also stronger with shatter resistance features. It implies that the lenses of safety glasses must pass a drop ball test, in which a ball is dropped on the lens to test whether it is hard enough to withstand all kinds of accidental assaults. The lenses are most commonly made of virgin resin polycarbonate which is stronger than regular lenses. The light weight and impact-resistant lenses of the safety glasses come in both prescription and non-prescription forms including bifocal safety glasses.

Safety glasses have both sturdy and heat resistant frames and are designed to prevent the lenses from being pushed into the eyes during an accident.

They also protect your eyes from harmful UV rays and are often used as sun glasses. Most safety glasses have a scratch-resistant coating as well.

A new standard, ANSI Z87.1-2003, was passed recently to give instructions regarding the requirements of different types of safety glasses for different workplaces. There are mainly two types of lenses: high impact and basic impact. It is the responsibility of the employers who require protective eye wear for their employees to consult OSHA (Occupational Safety & Health Administration) regulations to know which type of safety glass is required at their job sites.

Dual Bifocal Safety Glasses
Smith & Wesson Olympic 30-06 Dual Bifocal Safety Glasses

Dual bifocal safety glasses can be superior to traditional bifocal safety spectacles in terms of correcting the wearer’s eyesight; but only provide vision correction within the near range. This is because their lenses are made with a single, positive power in the bottom section. The upper part is non-prescription. In this case, users of bifocal safety glasses can only get visual aids when they try to view nearby objects or materials. Plenty of people can benefit greatly from this eye wear, especially those who work with power tools.

However, traditional bifocal safety glasses are not sufficient if wearers need to see objects in the distance. In fact, the combination of both nearsightedness and presbyopia correction is the typical function provided by regular bifocal reading glasses. Dual bifocal safety glasses function, in a similar way as regular bifocal reading glasses. The upper section of their lenses helps the user to see distant objects and the lower section is for presbyopia correction, which is extremely helpful for certain groups of people.