Why are contact lenses less clear?

No matter how innovative contact lenses are, vision correction is still the most basic function, and the clarity of contact lenses must be guaranteed. So, why do some contact lenses clearly have the same degree, but not high clarity?

1. The degree may not be accurate enough. On the one hand, the wearer should do the optometry before buying the contact lens, reasonably calculate the degree of the lens, especially astigmatism patients can not easily ignore the degree of astigmatism, must ensure that the degree is accurate; on the other hand, to check the degree of the lens is correct, such as inferior products may appear inaccurate degree, processing defects, detection flaws and other problems.

2. Lens design brings about differences. Each major brand has its own patented design, aiming to continuously improve the comfort and clarity, to bring you a better visual experience, but the parameter differences between different materials and different designs may lead to some slight differences in lens definition.

3. The water content is quite different. Water content is closely related to refractive index, and contact lenses with high water content have a stronger refractive capacity. If the water content of different brands varies greatly, sensitive friends may perceive fluctuations in clarity when wearing them alternately.

4. Different effects of the batches. The size of contact lenses is small, the processing process is relatively precise, different production batches sometimes inevitably appear very small errors, so some friends will find that at different times or through different channels will be a little different lenses. However, regular production companies will try to minimize this error.

The author strongly suggests that when you buy contact lenses, we must go through formal channels, with many problems of inferior products, which may bring great damage to the eyes. At the same time, it also reminds everyone that in the pursuit of beauty, we must not ignore any small details, and be sure to bring clarity, comfort and so on into the scope of consideration.