Glasses Size - Frame Width
To really know how big a frame is, and how it will look on your face, you have to determine the width of the entire frame. The outer width of the frame is the distance between the visible areas on the left and right sides of the frame, namely, the distance between the frame and the junction of the two temples. The inner width of the frame is the distance between the inner sides of the two temples at 60mm behind the plane of the lens. This is just the contact point between the temple and the human temple. If it is too tight or too loose, it will affect the wearing comfort. The weight of the frame is evenly distributed across the bridge of the nose (or evenly distributed between the two nose pads on the bridge of the nose).
The frames should be the right size.
When choosing glasses for kids, pay attention to the size of the frame. Be careful not to choose frames that are too big for your child, and avoid frames that will create shadows or blind corners.
What are keyhole glasses used for?
The keyhole distributes the weight of the glasses to one side of the nose rather than the top. It's a good choice for those with broad noses. Due to the lack of support at the top, the keyhole design will result in the frame being positioned lower than the saddle bridge frame. If you find that your saddle frame causes your eyes to be located just below the center of the lens area, you may try a wider frame or opt for a keyhole design.
How to choose frames?
Of course, the best way is to try it on many times. The visual effect is more direct and reliable than trying on. Spend more time and you can find your own style suitable for you.
In addition, where comfort and aesthetics permit, choose the size as large as possible so that the view will be larger. However, there are some optometric parameters that limit the selection of frames. For example, if the pupil distance is very small, choose a size that is too large is not suitable. Try not to choose the product with spray paint on the surface, because durable time is shorter.
You should pay special attention to that TR, plastic steel, stainless steel, wood, β titanium glasses temple may not be adjusted. When trying on, it should be noted that the weight of the lens has not been added to the trying frame, to avoid the problem of discomfort (such as an easy slip of the frame) found after the preparation.
What is the cheapest way to buy prescription glasses?
Optometry must be accurate. Optometry is the main basis for glasses. The accuracy of optometry is directly related to the success rate of the glasses prepared. Optometry must be accurate first, and the difference between the upper and lower levels should not exceed 12.5 degrees of the prescription. Secondly, the astigmatism axis should be accurate, and the general axis difference should be limited to plus or minus l to 3 degrees. In addition, the interpupillary distance must be accurate, and the interpupillary distance must be equal to the optical center distance of the lens. If you do not pay attention to the above-mentioned checkpoints in optometry, the prepared spectacle lenses will have blurred vision, prolonged visual fatigue, dizziness, nausea, and even diplopia. Optometry is best to go to a professional eye hospital. For children’s optometry or to wear glasses for the first time, you must use mydriatic optometry to be accurate. You can also check if there is any problem with the fundus, and go to the hospital to get more accurate optometry.
Be sure to wear qualified glasses.
Many people are eager to buy glasses online without the necessary checks at a proper optical center for glasses. But, in reality, these tests are not only to replace glasses but to take responsibility for the safety of their own eyes. These cheap and inferior glasses will do a lot of harm to most myopic friends. If you wear unqualified glasses, it will cause visual fatigue, headache, dizziness, nausea, and other symptoms, vision loss. Severe cases can lead to amblyopia, strabismus, or other functional impairments.
Different Type of Lenses: How to Choose
Photochromic lenses: These lenses change from clear to tinted with sunlight. You may no longer need sunglasses although they may not darken in your car if the windshield blocks UV rays. They can be either glasses or plastic.
Polarized sunglasses: Polarized sunglasses can reduce glare from a surface like water, so they are great for sports and driving. But they can make it hard to see the liquid crystal display on your car’s dashboard.
As for different types of lenses, this post has introduced several kinds of. When buying eyeglasses, take these into consideration. If you need a pair of glasses, you can try Koalaeye glasses. They are stylish and come at a cheap price.