A dozen or so dollars of contacts are not to be worn. The material of these contacts is usually very poor, and if you wear these glasses, they can easily cause serious effects on your eyes, such as severe corneal epithelial burns, corneal inflammation, corneal ulcers, and follicular conjunctival inflammation, which can cause conjunctival congestion, vision loss, increased secretions, and even serious intraocular infections. Therefore, for the health of your eyes, it is recommended that you do not wear contacts, especially those of poor quality. If you wear them occasionally or for a short period of time for work or beauty needs, the effect is not significant, but when you wear them, you must choose some expensive, relatively good quality contacts, so that the impact is relatively small.