The Pengyifa swimming goggles factory believes that the power of the swimming goggles should be lower than the usual glasses. If the power of the swimming goggles is not selected properly, dizziness and blurred vision will easily occur under the water. Because water has a refractive index, the trick to choosing swimming goggles is: The degree should not be the same as the frame glasses that you usually wear, but lower than the usual frame glasses for reading.
The general standard is this:
The degree of swimming goggles = the degree of myopia + half of the degree of astigmatism, minus 50-100 degrees.
For example, if the nearsightedness is 400 degrees and the astigmatism is 0 degrees, then the suitable nearsighted swimming goggles are 300 to 350 degrees. If the degree of myopia in both eyes is inconsistent, the lower degree is the main one.
To choose good anti-fog goggles
Check whether the swimming goggles have an anti-fog coating. The anti-fog coating contains hydrophilic chemical components, which can absorb more water vapor, and the anti-fog coating of a good swimming goggles is not easy to fall off.
Try on swimming goggles to eliminate health risks
Before buying swimming goggles, try on them first. Gently press either side of the swimming goggles toward the eye socket. If you feel a certain amount of suction and do not feel that the suction is too large, then the size is relatively suitable.
Then try on the strap to determine whether the tightness of the strap is comfortable, and whether the softness of the gasket at the eye socket is just right. If it is too hard, it will cause eyebone pain over time. If it is too soft, it may be possible. There is a risk of increased intraocular pressure
There is a little trick when trying on. You don’t need a mirror strap and attach the goggles to your face. If you feel a slight absorption, it means that the goggles and the face fit well. The key point is to judge whether the frame, eye mask and eye socket are not. Is the length of the nose bridge suitable for a perfect fit? Manufacturers of custom swimming goggles support customization.