Which vitamin is best for eyesight?

The Optical Center of A Lens

When wearing glasses, try to look through the optical center of the lens. This needs the cooperation of the neck, you can slightly lower the head when looking at the computer, to adjust the line of sight. The Center of optical glasses is divided into two kinds: 1 mm up myopic lens center is the most proper, of course, more than 2-3. And the most important thing is that the lens pupil high (about the two-lens optical center of the high and low) must be proper (that is, the right of the lens optical center is 1 mm, the left must be 1 mm. 2-3 mm is the same, what is the height of the pupil on the right side must be the same on the left side. The optical center of the presbyopic lens is 1 mm, the most proper.

The birth of progressive lenses

In 1907, British optometrist Owen Aves first proposed the concept of progressive lenses and got the first patent of progressive lenses. In 1910, Henry Orford Gowlland designed and made a similar lens in Canada, but technical limitations prevented it from succeeding. In 1959, Bernard Maitenaz, a French optical and mechanical engineer, developed the first progressive lens, which was successfully put into the commercial market for the first time and became a milestone in the history of world optometry. With the development of science and technology, the design of progressive lenses has been greatly developed.

Suggestions for Using Varifocal Glasses

If it is difficult for you to get used to the new varifocal glasses, here are some suggestions for you.

1. Wear the varifocal glasses consistently so as to let your brain learn how to use them.
2. The most common accident is tripping when getting used to new varifocal glasses. So, you can mix up your routine to keep your brain active and prevent you from tripping up.
You can also ask those who wear varifocal glasses to give you some advice.

What Is Anti-Reflective Coating?

Anti-reflective coating, also known as AR, anti-glare, no-glare, or glare-free coating, can provide benefits to your vision. Anti-reflective coating is added to lenses to reduce glare caused by light hitting the back of the lenses.

Anti-reflective coating is designed to eliminate all reflections from the front and back surfaces of your lenses. Without bothersome reflections, more light is able to pass through your lenses which optimizes your vision. So, anti-reflective lenses can improve vision and make your eyeglasses more visually attractive.

Zenni Optical Oval Glasses

These inexpensive, no-fuss oval glasses come in clear, brown, black, or aqua. Price includes frame and basic prescription lenses, scratch-resistant coating, and UV protection. People with square faces may be best suited to wearing oval glasses. Zenni has a try-on feature where you can upload a photo of yourself so you can see what you look like with the glasses on.

The keyhole bridge is different from an ordinary bridge.

The common bridge is designed to span the tip of the nose like a saddle. The two sides are evenly distributed along a wider area for a more even distribution of the weight of the frame and lens. A common bridge is the most effective way to shorten and reduce the shape of the nose. Especially when the upper margin of the frame is aligned with the eyebrow line or just below the eyebrow line, the overall structure of the face is more balanced. Both kinds of bridge designs have been widely used. Lighter colors, like clear crystal or pale yellow, will reduce the effect of keyhole bridges on the nose.

The keyhole design touches two sharp points of the nose bridge eliminating pressure from the top of the nose. This style makes a bold fashion statement suitable for both men and women. Athletic designs with comfortable details make this collection the first choice for everyday wear. If you’re ready for a new look, peruse our catalog of incredible selections with fashionable, lightweight and comfortable keyhole glasses.

The disadvantages of progressive lenses

1. The field of view in the near and middle distances is relatively narrow.
2. The adaptation time is longer and patients with greater astigmatism are not suitable for wearing.
3. The peripheral aberration is large, and there will be large astigmatism in the periphery.