Are Dark Eyelids A Health Warning?
Fri, Mar 18, 22 By : Koalaeye
The Disadvantages of Polycarbonate Lens In this section, we will show you the disadvantages of polycarbonate glasses. First, the polycarbonate lens is expensive than other regular lenses. It can cost up to double the price of regular eyeglasses. Second, compared with high-index lenses, polycarbonate glasses have a lower abbe value, which is used to measure the dispersion of light for different eyeglasses lens materials. Polycarbonate lens rates lower mean they have the potential to cause slight chromatic aberrations in your...

The Disadvantages of Polycarbonate Lens

In this section, we will show you the disadvantages of polycarbonate glasses.

First, the polycarbonate lens is expensive than other regular lenses. It can cost up to double the price of regular eyeglasses.

Second, compared with high-index lenses, polycarbonate glasses have a lower abbe value, which is used to measure the dispersion of light for different eyeglasses lens materials. Polycarbonate lens rates lower mean they have the potential to cause slight chromatic aberrations in your peripheral vision.

Third, compared with Trivex lens, polycarbonate lens has bad durability since they are thinner and lighter.


Allen OTG Safety & Shooting Glasses

Chemistry LABS and carpentry aren't the only applications that need safety goggles on top of glasses.These Allen OTG glasses work better on indoor shooting ranges. You can use these comfortable safety glasses to better focus your front view. Unlike the other OTG safety glasses on the list, these glasses lie flat on the side of your head and are specially designed to fit comfortably under the earmuffs without breaking the noise seal.



Eyeglasses in brick-and-mortar stores cost extra.

In order to attract the attention of customers, physical optical stores need to carry out store decoration, and customers need to buy glasses to share the cost, so the glasses in physical stores are more expensive. Physical optical stores have other expenses, such as electricity, employee costs, rent, and so on, which is a big expense, naturally, but also to the customer to share. These are invisible consumption and need to be tied to the customer.


Buy Prescription Glasses Online Step By Step

1. Before you can buy glasses online, you’ll need a current glasses prescription.

2. Select an online retailer, comparing online retailers like EyeBuyDirect and KOALAEYE until you find the best fit for your needs.

3. Shop for the perfect frames according to face shape, frame favorites, the budget, etc.

4. Once you’ve found your perfect frames, you’ll enter your eyeglasses prescription and pupillary distance to choose the lenses.

5. Read over the fine print on return/exchange policies and product warranties before you complete your order.

6. Having picked your perfect frames, entered your prescription information, added any lens coatings and upgrades, and checked your online retailer's warranty and return policy, it’s time to complete your order.



What Are Trifocal Lenses?

When you are over 40 years old, your eyes may become old, too. Your corrective lens requirements may become increasingly unique, Most people are familiar with bifocal glasses but unfamiliar with trifocal glasses. So, in this post, we will show you what trifocal glasses are.

Trifocal lenses have three different corrective lenses within one lens to offer you intermediate, distance, and near correction, all in one pair of glasses. The varying levels of correction cab are laid out in a couple of different ways to ensure the layout suits your unique vision needs and comfort level.

The near vision is to correct close-up vision, the intermediate vision is often used for card playing and staring at the computer screen fall with this range of vision, and the distance vision is often used for driving or looking at a whiteboard.


How do I know what size glasses frame I need?

With unified factory product size, why others can wear without problems, but there is a problem when I wear the glasses? There are differences between the contours of each person's face, including factors such as the width of the head, the distance between the ears and the corners of the eyes as the crow flies, the thickness of the bridge of the nose, and so on, which involves ergonomics. But there is one thing we can agree on. When people with the same ear distance wear the same type of glasses, they have different feelings, even if the arm length of the glasses is the same. People with fatter faces will feel uncomfortable. The face will be uncomfortable because the ear distance is the same, but the face width is not the same, resulting in an increased oblique distance of the temple, resulting in a sense of pressure.

It is very simple to solve this problem. You need to look at a variety of parameters in the frame of the glasses, including the total width of the frame, the length of the arm. These parameters will be reflected in a qualified spectacle frame.



The Role of Fishing Sunglasses

The special effect of the polarized lens is to effectively eliminate and filter the scattered light from the beam. In general, a polarized lens can arrange all the light in the same direction, so that the visual field is clear and natural. It also blocks ultraviolet light, reducing damage to the eyes and clearing out blinding light. Fishing glasses have the function of polarized light, so they can block all harmful light without affecting the transmission of visible light, which can really achieve the function of eye protection. In addition to the basic anti-ultraviolet function, fishing glasses also have the functions of anti-glare, reducing pavement reflection light and water scale light, etc., suitable for driving, fishing, tourism, and daily wear.

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