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Vision correction is a delicate and complex process that requires considerable work and the attention of specialists to achieve a result. But technology doesn’t stand still, and today you can often see prescription or custom lenses among ophthalmologists' prescripts. Let's see what it is and in what cases we should use them.
When to use prescription lenses
Creating prescription lenses is a time-consuming process, but necessary in the following cases:
- At high degrees of myopia and hypermetropia. Traditionally, for the treatment of such diseases, prism glasses are used, the lenses of which work like prisms. However, they may have side effects: image distortion, increased eye fatigue, etc. Prescription lenses allow you to achieve the performance of prism glasses while eliminating the disadvantages of a prism. In addition, they are thinner in design, which makes them more comfortable for everyday use.
- To solve this problem, you should use cylindrical lenses. Their task is to increase or decrease the refraction of light in a specific meridian. But a healing tool can also have the opposite effect. For example, many patients complain about the distortion of the shapes and colors of objects due to glasses. And the use of prescription lenses helps to avoid such inconveniences.
- Traditional correction doesn’t always give the desired result in this case, but prescription lenses significantly increase the chances of success due to specific production technology.
- With non-standard parameters of the distance between the pupils' centers and (or) nasal bridge. The use of ready-made glasses in such situations leads to peripheral distortion of the image and pupils not falling into the optical center of the lens, so their effectiveness will be minimal.
- If you need to use diameters smaller or larger than standard, this allows you to use a wide range of diopters.
- When complex correction is required.
Prescription lenses are spectacle glasses that are manufactured in a wide range of diameters and have high refractive power. They can be tinted, or photochromic. Custom prescription lenses are suitable for people who need complex vision correction.
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