During the audition stand, high myopia is often undercorrected, while high hyperopia is often overcorrected. After checking the position of the lens, let's take a look at the angle of the discountglasses lens.
We usually look through the optical center of the lens, where the visual axis is at a very small angle to the plane of the lens. If the lenses are tilted at different angles, the clarity of the same lens will be different. If you are interested, you can try it yourself (clarity, blurriness, and visual distortion are all possible).
This is because the lens produces new spherical and cylindrical lenses at different angles. That is to say, the lens is still the same, but the actual generated refractive power has changed. Many myopic children like to look up when rechecking their vision with kids eyeglasses online, which is also related to this.
If there is a significant difference between the tilt angle of the test frame and the tilt angle of the finished lens when trying on the lens, there will be differences in clarity and comfort before and after the finished lens. People with high height should avoid choosing frames with large tilt angles.
Many people with high refractive errors do not like to change their glasses and wear them for many years. For people with high height, the more obvious the above errors are caused by the lens itself.
There are now many try-on frames that can adjust various parameters of the try-on, such as eye distance and tilt angle. Refer to the parameters of the old glasses and adjust them to a reasonable range, so that the new circle glasses men produce can be as consistent as possible.
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