How ro Determine Your Face Shape
When you choose sunglasses, it is important for you to understand your face shape. The basic principle of choosing sunglasses is that you cannot wear round glasses with round faces, and square glasses with square faces. Otherwise, round glasses make faces rounder and square glasses make faces more square. The heart-shaped face can be worn in all shapes of glasses. For the oval face, which is a standard face, just don't choose an overly exaggerated shape when choosing sunglasses. Choose sunglasses as far as possible to avoid being too fancy because the fancy sunglasses will make you look very lackluster.
How to Test Blue Light Glasses (Amber and Red Lenses)
This section will show you how to test blue light glasses with amber or red lenses.
1. The Black and Blue Squares Test
1. Prepare black and blue paper.
2. Wear your blue light glasses after sunset and check whether both paper appear black.
3. If they do not appear black, your blue light glasses can’t block all blue light.
2. RGB Color Chart Test
1. Prepare an RGB color chart as follows.
2. Wear your blue light block glasses and look at the chart.
3. After wearing blue light blocking glasses, if the B section becomes black and the G section becomes darken, it shows that your blue light glasses block blue light and some filter some green light.
4. The less bright the green circle with your blue light glasses, the better they are.
Besides the above ways, you can ask the professional optician to perform a professional blue light glasses test, which would be more reliable. After that, you can know whether your glasses work effectively to block blue light.
What’s more, if you want to purchase a pair of effective blue light blocking glasses, you can try Koalaeye Optical. It is cheap and provides free shipping services.
What kind of glasses can people with round faces choose?
Always thought, like what has been said on the Internet, if you wear black frame glasses with large lenses, they can make you look small on the face. This is a mistake, because the black frames are too obvious, creating the wrong area on your face where the glasses are too small.
And for this kind of rimless glasses, because the bottom part is transparent, they will not destroy the partition, and you will feel the face is pretty sharp. For a man with a round face, the appropriate choice is a flat or pear-shaped frame. For a woman with a round face, in principle, she should avoid choosing any very obvious characteristics of the frame, and should not choose a too round or straight-line frame. Round faces are suitable for slender or square frames or pear-shaped frames. The human face of a round face is shorter, so, they had better match the slender glasses frame that takes curve slightly to reconcile the whole feeling. The square glasses or the frame with angle, are helpful for modifying the facial ministry line, highlighting the longitudinal line.
Go to a regular hospital to check your eyes
On the surface, pseudo-myopia is the same as true myopia, that is, looking far away is blurred and near looking clearly. But looking at the essence through the phenomenon, the difference between the two is obvious. The so-called pseudo-myopia is due to frequent incorrect use of the eyes. The ciliary muscles continue to contract and spasm, and they cannot get the rest. And the crystals are also in a state of thickening. In this way, the parallel light from the outside enters the eye, and after the thickened lens chamber is flexed, the focus falls to the front of the retina, and it is naturally unclear to look at things in the distance. During this period, the eyeball has no organic changes. If you can take proper rest and treatment, pay attention to eye hygiene, use your eyes reasonably, and hope to restore normal vision. However, if the false myopia is not corrected and treated in time, it will develop into true myopia over time. There are many ways to treat pseudomyopia, mainly relaxation and adjustment, such as application of cycloplegia, acupuncture, physical therapy, improving the learning environment, paying attention to eye hygiene, and doing eye exercises. If you suspect false myopia, you should go to the hospital for an eye examination as soon as possible.
Types of aspheric lenses
There are two types of aspheric lenses: single aspheric surface (single aspheric surface for short, different from the outer aspheric surface and inner aspheric surface) and double aspheric surface (double aspheric surface for short). For the outer aspheric surface, convex is an aspheric surface and concave is a spherical surface. For the inner aspheric surface, a convex surface is a sphere, and a concave surface is an aspheric surface. In addition to correcting aberrations, the double aspheric lens also improves the effective field of vision compared to the single aspheric surface. When people's eyes look through the edge of the lens to see things, like driving when looking at the reflective mirror, it often affects vision because of the large aberration at the edge of the lens. Previous designs of aspheric plates have analyzed a single ray of light passing through the center of the pupil. Wavefront technology controls the entire beam of light passing through the pupil, eliminating high-order aberrations.
Semi-Rimless Frame Glasses
Half-rim spectacle frames replace part of the spectacle frames with nylon wire, giving people the feeling of bottomless frames. It is lighter and looks more chic and firm. If you are a highly myopic friend, choose a pair of half-rim glasses, which can not only reduce the load on the bridge of your nose but also look more fashionable. Half-rim glasses are the first choice for men in the workplace, and they are more mature and stable.
The glasses are stylish and have a personality, and the shop decoration has a designer style. A combination of fashion and business, the nose pads are designed with water droplets that are more suited to Asian faces. Breaking the design idea of traditional glasses, the temple is under the glasses, and the arc of the temple makes the face look small. Breaking the bottom half of the frame, the top half of the frame is more designed, with comfortable, thinner lenses.