How to measure the base curve of the cosmetic contact lens? What are the dangers of having a small base curve of the cosmetic contact lens?

Cosmetic contact lenses are a type of contact lens that many people have worn. They are also available in different colors. So how do you measure the base curve of cosmetic contact lenses? What are the dangers of having a too small base curve of a cosmetic contact lens?

How to measure the base curve of the cosmetic contact lens

1. If you are wearing contact lenses, whether colored or colorless, first make sure whether the contact lenses you are wearing are comfortable. If they are comfortable, just check the base curve (BC) parameter description on the bottle, or check the base curve of your own brand model on the Internet, and then buy lenses with the same or the closest base curve. If they are uncomfortable, too tight means that the base curve of your original lens is too small, and too loose means that the base curve of your original lens is too large. If the base curve is too large, the contact lens will move inside the eye and it will be difficult to fix. The choice of base curve will affect the comfort of wearing the contact lenses.

2. If you have never worn contact lenses, you can go to an ophthalmology hospital or a large eyewear store to get them tested (with a curvature meter). If it is troublesome, it is recommended to choose 8.6mm. For the vast majority of Chinese people, lenses with a base curve of 8.4-8.6mm can be adapted to better. Relatively speaking, the adaptation range of 8.6mm is wider, because under normal circumstances, a slightly loose lens will not affect the comfort, while a slightly tighter lens will easily cause eye soreness. Of course, if the difference is small, the eyes can still adapt quickly after wearing it for 1 or 2 days.

What are the dangers of having too small base curve of the beauty lens?

If the base curve is too small, it will cause pressure on the eyeball and easily cause eye inflammation. The base curve that suits most Asians is between 8.4mm and 8.6mm. The base curve of cosmetic contact lenses needs to be tested with professional instruments and must be compared with your actual measured base curve. At the same time, the principle of "bigger rather than smaller" should be followed when selecting. Generally, a base curve greater than 0.2 is recommended.

The base curve is the curvature of the contact lens. Simply put, it is the curvature of the eyeball when viewed from the side. Because the eyeball is a sphere, the lens also has a curvature. Generally speaking, the larger the base curve of a contact lens, the flatter the lens surface, which will easily cause lens slippage. Lens slippage means that the lens moves up and down when you blink.