What is the highest degree of contact lenses

It's understandable that many people prefer wearing contact lenses to wearing glasses. However, it needs to be made clear that the degree of frame glasses and the degree of contact lenses are not the same thing, and the two cannot be simply confused. It does not mean that you have to wear contact lenses of the same degree as the frame glasses. When fitting contact lenses, you need to convert the degree of your frame glasses into the degree of your contact lenses. This is the correct way to choose. So do you know what the highest degree of contact lenses is?

Contact lenses, also known as contact lenses, are lenses that are worn on the cornea of ​​the eye to correct vision or protect the eyes. Refers to the clarity of a substance. It is a combination of the chemistry, purity and hydration of the substance, among other factors. The transparency of a material is usually expressed by the percentage of transmittance of light of a specific wavelength through a sample of the material. This value is between 92% and 98% in most clear contact lens materials (non-tinted).

Most brands of contact lenses have a degree of 100 to 900, which can only meet the needs of people with general myopia. It is not so easy to choose contact lenses for those who have acquired myopia or congenital high myopia. This is because not all brands of contact lenses have high-degree glasses.

High-power contact lenses must be thinner and lighter to be comfortable to wear, because people with high-power contact lenses have higher requirements. There are other brands of contact lenses that also have high-power contact lenses, but they need to be specially customized. Friends with high myopia can take off their heavy frame glasses and wear light contact lenses beautifully.

There is a conversion formula for the conversion of frame glasses and contact lenses. Contact lens diopter = frame glasses diopter ÷ (1-0.012 × frame glasses diopter). 1 diopter is equivalent to 100 degrees. The diopter of myopia is a negative number, and the diopter of hyperopia is a positive number. 0.012 is the distance between the highest point of the frame glasses and the black eyeball, in meters. According to this formula, the degree of frame glasses and contact lenses can be calculated correctly.

Contact lenses can correct mild astigmatism. Generally speaking, the lower the water content, the better the effect of correcting astigmatism. If the astigmatism degree is high, you can choose customized contact lenses for astigmatism. In principle, if the astigmatism degree is greater than 75 degrees, it is recommended to choose special astigmatism contact lenses.