Difference between Bifocal and Trifocal Safety Glasses with lenses

Difference between Bifocal and Trifocal Safety Glasses with lenses

Unavoidability, when you hit figure 40 of your age, your eye structure declines because of the age factor. And this maturity level comes with refractive error known as presbyopia. Thus, many people wear Safety glasses with readers. Unluckily, this change is not in your hand no matter how much you eat or exercise because a refractive error is common among every mature person. 

Wait, dear, don’t disappoint if you have reached around this figure because advanced eye care technology has brought excellent options for you. 

First, you require to understand the truth of this age because presbyopia is associated with age-related. And in this situation, you get blurry vision. Besides, this visioning process gradually appears, and you cannot read newspapers or book very close to you. You move the reading text further away from you to get a clear view. 

So, this sound is familiar. If you are experiencing these symptoms, visit an optometrist for a detailed eye exam. At age of 40 years, the eye lens loses its natural flexibility. When you were young, the eye lens is too flexible to change any shape and easily focus through the retina. 

In mature age, the lens becomes rigid and unable to change its shape at a young age. Therefore, it was hard to give a clear view of closer objects. Prescription lenses are the perfect option to combat with presbyopia situation. Fine, but what about the lens type and which one is right for you? Let’s explore bifocal and trifocal lenses. 

  • Bifocal lenses: 

Bifocal lenses were created in the 18th century when one lens was cut into two halves by Benjamin Franklin. These cut lenses were designed for two different prescriptions and then joined each other. The upper half was designed to see distant objects and the lower half part for the vision of closer things. When two lenses of different prescriptions were attached, a visible line appeared on the lens surface. 

The portion of the corrective lenses was designed in multiple shapes like round, rectangular, full-bottom, or half-moon of lenses. In-between near and far distances, bifocal safety glasses were not designed for the intermediate vision zone. However, the intermediate vision area was far around 18-24 inches from the user’s face, it can become hard to view something like watching TV or a computer screen with bifocal lenses. 

  • Trifocal lenses: 

In order to correct the intermediate distance, trifocal lenses were designed. Bifocal lenses correct close and far vision objects, but cannot give a clear view of the mid-distance. Trifocal lenses were invented to correct in-between vision zone because these lenses featured small lenses between two vision zone. As a result, there were three different vision zone in trifocal lenses by name. This intermediate vision zone lets the user see things precisely that were placed at an intermediate distance like a computer screen and TV. Trifocal lenses had visible like bifocal lenses. 

Suggestion for bifocal and trifocal lenses: 

In many conditions, polycarbonate material is the perfect option for specific objective bifocal or trifocal lenses. This high-index material is lightweight and thinner than standard plastic or glass lenses. It is impact-resistant material than others. 

Another recommended thing is anti-reflect coating because it decreases distraction from the lens due to reflected light. Besides, use photochromic lenses for the use of throughout the day. This advanced technology lets your Bifocal Safety glasses and trifocal lenses become transparent in an indoor setting and shaded when you are outdoor. Photochromic lenses have sun-activated shades like green, neutral gray, and brown. Try wx safety glasses with bifocal and trifocal lenses.

Difference between Bifocal and Trifocal Safety Glasses with lenses
Difference between Bifocal and Trifocal Safety Glasses with lenses

Wileyx Axis (SEG)

Difference between bifocal and trifocal lenses: 

First, both bifocal and trifocal lenses are prescription safety glasses. They have several advantages that apply to one lens surface, and you can view things place at different distances. Besides, they have three optical powers. Bifocal lenses have two different vision zones, and trifocal lenses have three vision areas to look at multiple places. 

Bifocal lenses are divided into two different vision parts. The lower lens section is dedicated to viewing closer objects. On the other hand, the upper part is for viewing distant objects. Trifocal lenses are divided into three different vision sections. 

Difference between Bifocal and Trifocal Safety Glasses with lenses


Two vision sections are the same as bifocals, but trifocal lenses add an intermediate vision zone. The intermediate zone is used to view things that are mid-distance between near and far distance. You require a middle vision section while watching TV or working on a computer screen. 

Bifocals were discovered in the 18th century, and trifocals were designed in too much last in the 1940s. Initially, bifocal lenses were designed to cut glass lenses into two parts and then made ready for different vision sections. But this process did not apply to trifocal lenses. 

Bifocals and Trifocal safety glasses are particularly designed for a user who has presbyopia. Presbyopia is gradually vision loss after a specific age. Well, bifocals are also recommended for kids, but not trifocals. Bifocal lenses have a visible line in the center of the lens surface, but an intermediate region is added in the trifocal lenses. 

Where to buy bifocal and trifocal lenses: 

If you are already using prescription lenses, you would be well aware of online and offline retailers. Several online retailers are selling bifocal and trifocal lenses with numerous options. If you also wear trifocal lenses, you should visit an eye care professional clinic. They can suggest you latest prescription and offer you the perfect lens option. With vision insurance, you can get the best vision perks and choose retailers that can accept vision plans.

In the case of cataract surgery, your surgeon can give you the best lens that suits cataract lenses, and numerous brands are available. The eye surgeon will provide the best suggestion to correct vision errors. For vision correction, you should take advice from your doctor regarding a top brand. Click here to buy all types of prescription safety glasses with bifocal and trifocal safety glasses.


Thus, trifocal lenses are prescribed for older groups of people with complicated vision issues. But anyone can use trifocal lenses if they have the same vision issues. The drawback of trifocal lenses is that they take enough time to adjust than your expectations. On the other hand, bifocals are a perfect option for people of two different powers like near and far distances. If you are using bifocals and find it hard to concentrate on a computer screen, you are a candidate for trifocal lenses.

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Difference between Bifocal and Trifocal Safety Glasses with lenses