What is round seg bifocal? | KOALAEYE OPTICAL

What is round seg bifocal?

Glasses in a Day

With decades of experience in the optical business, it allows the fastest prescription eyewear service. Male and female frames are mostly imported from Germany, Italy, and France. All orders are shipped the same day they are received, including Saturday, ensuring your new glasses arrive quickly. The team assembles, packs, and ships your glasses at our Massachusetts facility on the same day you order them.


Where did the glasses emoji come from?

The glasses emoji was approved as part of Unicode 6.0 under the name Glasses in 2010 and was added to Emoji 1.0 in 2015. Unlike the bespectacled 'nerd face', which is often used to suggest a cool sense of fashion. Just clicking on a few posts with the emoji is enough to make a person want to follow the eyeglasses fashion trend.



Consider the elements of frame comfort.

What we need to know is that the frame exists first as a positioning device for the lens, and secondly as a beauty. The pupil is consistent with the optical center of the lens, so it should not be too high or too low. The horizontal direction is not skewed, and there is no one high and one low phenomenon. Bilateral symmetry is a standard for manufacturing enterprises. Non-mechanical symmetry is for the wearer. The frame should be adjusted according to the size of the wearer's face. The frame is not easy to slide down, and frequent slide is prone to the phenomenon that the pupil is too high and low to match the face.


Disadvantages of Prism Glasses

Although prism glasses are mostly used for correcting binocular vision, they also have some disadvantages which are said by those who have worn them. They said they suffer from some discomforts, such as headaches, pain with eye movement, wandering eyes. Misaligned eyes, nausea, double vision, and more. In most cases, side effects can be corrected with an adjustment to someone’s lens prescription, eyeglasses frames or medication.

At the same time, you need to know that alignment is extremely important when wearing prism lenses. Prism lenses may be not efficient if they are misaligned. But they can be fixed with a professional adjustment. If you are experiencing any problems with new glasses or your old prism lenses stop working, contact your vision optometrist.



Sunglasses are a type of non-prescription sunglasses.

Sunglasses are popular non-prescription glasses. As a kind of non-prescription glasses, sunglasses can protect your eyes. Many sunglasses filter out ultraviolet lights, which can be harmful to your eyes. Wearing sunglasses can help keep your eyes healthy. Sunglasses have become fashion's flagship products, and countless products can be sold at different prices. The combination of function and fashion has made sunglasses the favorite type of non-prescription eyewear for consumers.


What Are High-Index Lenses?

High index lenses are eyeglasses lenses that are designed to be thinner and lighter than regular lenses. High-index lenses have a high refractive index than their conventional counterparts. So, they are generally recommended for people who have significantly high refractive errors and strong prescriptions for nearsightedness, farsightedness or astigmatism.

High-index lenses correct all types of refractive errors. And they are also available as single vision lenses, or a reading prescription that corrects presbyopia, such as in a bifocal or progressive lens.

High-index lens has a higher refractive index and which is ranging from 1.53 to 1.74. A lens with an index of 1.74 could be up to 50 percent thinner than a regular plastic lens with an index of 1.50.


Sale priceFrom
Sale priceFrom


AMMA RAY 003 anti-ultraviolet, strong, harmful blue light computer glasses

They can reduce digital eye strain caused by the harmful blue light emitted by digital screens. They help relieve visual fatigue and discomfort caused by long hours surfing the Internet, playing games, and working under fluorescent lights. These photosensitive glasses come with UV400 for protection and glare reduction. Ultra-light, with flexible TR90 nylon materials, the glasses are durable. The casual frame is designed to make you look professional and stylish while working or playing video games. The magnification/power of your computer reading glasses depends on how far away you are from the screen.

Leave a comment

All comments are moderated before being published.

This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.