The cornea gets oxygen through tears, aqueous humor, limbal blood vessels and air. However, contact lenses are invisible. Wearing contact lenses for a long time will cause corneal edema and cause friction damage to the cornea. Therefore, don't wear contact lenses for a long time (no more than 10 hour every day), and stop using them for one or two days at a time, in order to cultivate the cornea. And care for the lenses in strict accordance with the requirements of invisible care, keep the lenses hygienic and prevent eye infections.
Invisible data include water content, center thickness, base arc, diameter, etc. Generally, the thinner the center thickness, the more comfortable it is to wear. However, due to its thinness, its shaping effect is poor, and the effect of correcting astigmatism is even worse, especially for those with moderate astigmatism or astigmatism ratio greater than myopia. If the tears are fully secreted, soft invisibility with high water content can be considered, because soft invisibility has spongy effect. When you wear it, you should suck tears to ensure its oxygen permeability. However, if tears are not secreted much, it is recommended to wear contact lenses with low water content. When the eye arch is high and the eyes are not very big, it will be more difficult to wear contact lenses with larger diameter (especially for first-time wearers), because the diameter of contact lenses has exceeded the maximum diameter that the eyes can open. For example, if the radius of curvature of the cornea is relatively small, the cornea is flat. If the contact lens is too close to the cornea, the tear circulation is insufficient, which affects the corneal metabolism. The radius of corneal curvature is large, and the corneal curvature is large. If the base arc is too large, its adhesion will be reduced. When the eyelids blink up and down, contact will be easy to follow, resulting in temporary blurred vision. If it is not well attached to the cornea, it will lead to blurred vision. Therefore, fitting invisibility must be carried out in formal places, including many optical shops without professional contact optometrists (there is a difference between contact optometrists and ordinary optometrists), and their careless examination leads to many patients' discomfort or various problems.
According to the data you wrote, right eye: -2. 25 degree myopia, -0. 25 degree myopia astigmatism; Left eye:-1. 25 degree myopia, -0. 50 degree myopia astigmatism.
Shen Qiang Yanyan beauty contact lens is sun-proof, with good sanitary conditions, but soft. If it is the first time to wear it, it is not recommended. If you are familiar with invisible wear, you can use it, but you must go to the optical shop first to check whether the base arc is consistent and whether there is inflammation. The center thickness is relatively thick, which is beneficial to astigmatism correction, and the proportion of myopia astigmatism is also in line with the conversion ratio.