Important to measure pupils
The interpupillary distance refers to the distance between the centers of the two pupils when the visual axis is square and parallel. In general, the optical center of the glasses should coincide with the visual axis of the eye when looking at eye level. That is, the optical center distance of the glasses should be the same as the interpupillary distance. Otherwise, visual discomfort will occur, causing visual fatigue and deepening the degree. Therefore, we must improve consumers' awareness of self-quality protection. Understand the knowledge of glasses, otherwise, only mild myopia, the long-term wearing of unqualified glasses will cause the degree to deepen and become high myopia. So be sure to go to a regular optician to get glasses.
Types of Progressive Lenses
At the same time, there are different types of progressive lenses and they are standard PALs, short corridor PALs, computer PALs, and Reading PALs.
Standard PALs must fit your vision needs. They can be added to frames of your choice, but you need to ensure that the frames are the right width and height proportions to grant enough space for the gradient changes in the lens.
Short corridor PALs are made to fit into smaller frames so as to suit a wider range of eyewear styles.
Computer PALs are designed for computer users and other occupations that require strong intermediate and distance vision.
Reading PALs are designed for those who enjoy reading and they can opt for a pair of lenses with a larger close vision zone.
What Are Adjustable Glasses?
Are you over age 40 and unhappy with your current glasses for the presbyopia correction? Most people with nearsightedness, farsightedness, or astigmatism need progressive lenses to see objects clearly. But some are frustrated by the relatively limited field of view these and other multifocal lenses provide for intermediate and near vision.
And, those people with presbyopia also have problems. They often are frustrated by forgetting to bring their reading glasses or are constantly needing to put them on and take them off to see clearly at a different distance.
If you also have the same trouble, here is some good news. You can use multifocal eyeglasses to solve these problems and give you clear, unobstructed vision at any distance with just a simple turn of a dial inside the eyeglasses frame.
And these glasses are called adjustable glasses or adjustable focus glasses. They are a versatile and affordable solution to correcting minor vision problems. They compensate for presbyopia and other refractive errors like farsightedness and nearsightedness. They are non-prescription glasses designed for everyday use.
You can see the top to look far away and look down to see near objects clearly because different portions of lenses offer different types of correction. With adjustable glasses, you have one focal length that varies depending on where you are looking.
Anyone can wear adjustable glasses, but they are especially beneficial for people who cannot afford regular glasses or for those who live in areas where regular glasses are not accessible.
The Acetate Spectacle Frame
The sheet spectacle frame is made of a high-tech plastic memory sheet. The current sheet material is mostly acetate fiber, and a few high-end frames are propionate fiber. The acetate fiberboard is divided into injection molding type and pressing and polishing type. The injection molding type is made by pouring in a mold. The plate frame is also suitable for people with a high number of heights because the frame is larger and can withstand a high number of lenses.
How to Choose Glasses for Face Shape?
How to choose glasses to suit my face? For the oval face shape, the walnut-shaped frames that are not too deep or narrow are a very good choice. For heart-shaped faces, the light-colored frames and rimless frames that have a light, airy appearance also are good choices. For oblong face shape, the frames with decorative or contrasting temples would be a good choice.
For square face shape, narrow frame styles are recommended. For diamond face shape, rimless spectacles and frames with oval or cat-eye shapes can be good choices. For round face shape, frames with a clear bridge and rectangular frames that are wider than they are deep would be good choices. For base-down triangle shapes, the frames with cat-eye shapes are recommended.
When selecting the eyeglasses shapes, you also need to consider other factors, such as hairstyle, eye color, and so on.
In addition, to choose eyeglasses, you can try Koalaeye Optical, which provides all kinds of glasses frames, eyeglasses, and sunglasses.
Service of GlassesUSA
Depending on your prescription, your glasses are possible to be delivered to your door within 10 to 20 business days. Glasses and contact lenses bought on the site come with a money-back warranty, free shipping, and return, and a 365-day warranty. GlassesUSA provides a two-for-one option. There are ready-made coupons.
Advantages of acetate glasses frames
Acetate frames are Lightweight and comfortable. As one of the daily necessities, the lightweight acetate frame will not bring a heavy burden to the bridge of the nose. Even if you need to wear glasses all day, you will not feel too much discomfort.
Acetate frames are durable. This is the key factor that makes acetate frames stand out from traditional plastics or other materials. Acetate frames are made by cutting, molding, and polishing multiple pieces of material, which makes them as strong as metal and ideal for eyeglass frames.
Acetate frames can complete various designs. Acetate makes the design easier to maintain. Acetate fiberboard can be designed with colorful patterns, different layers, and many colors. Embedded design can maintain design features more effectively without spraying or painting.
Although acetate frames are more expensive than ordinary plastic frames, it is more cost-effective to choose a more durable acetate frame because glasses are our daily necessities for a long time. Moreover, acetate is comfortable, light, and stylish. Therefore, next time you decide to buy a new spectacle frame, you can try a spectacle frame made of acetate.
