Whether or not keratoplasty lenses need to be replaced Different corneal contact lenses have different wearing cycles. After wearing the lenses, it is inevitable that the protein deposits will remain, and with the extension of time, some stubborn protein deposits cannot be thoroughly cleaned, and the long time of cleaning and rubbing will lead to deformation of the lenses. If the lenses are not replaced in time, the following problems may occur: 1. the discomfort of wearing the lenses may increase due to protein deposits. 2. 2. Deformation of the lenses may lead to deviation, poor correction, and loss of corrected vision. 3. The oxygen permeability of the lenses may decrease, and continued wear may result in eye redness, eye pain, corneal epithelial damage, and even infectious inflammation of the cornea. Therefore, the doctor recommends that the lenses should be used for 1 year, based on the maintenance of the lenses, the patient’s fit and eye reaction, and that the doctor should re-evaluate the lenses and order them according to the new parameters. How to protect the lens during cleaning and removal The keratoplasty lens is a hard contact lens, the material itself has a certain brittle, coupled with the finished lens center thickness is thin, so in the cleaning and removal process should be extra careful. 1, the lens has a concave and convex surface, not like soft contact lenses, like the reverse, at all times should be concave side up. Once the accidental convex side up on the desktop, smooth ground, the lens is attracted by the negative pressure, rashly pick up will abrade the edge of the lens or crush the lens. The correct approach is to pick up the lenses with the help of a suction stick or gently stick them up with water in your hand. 2, cleaning, concave surface up in the palm of the left hand, the right index finger finger lightly press the lens, in the palm of the palm along the horizontal, vertical and two oblique (“m”) a total of eight directions gently scrubbing, this step is used to clean the outer surface of the lens, careful to use too much force, causing the lens broken. The inner surface of the lens is scrubbed radially from the center to the edge, dividing the inner surface of the lens into four quadrants and cleaning each quadrant one by one. Lenses in the cleaning and rinsing process, the force should be gentle, along with the curvature of the lens, never against the curvature of the lens force, to avoid uneven force caused by the lens lens breakage. 3, the lenses should be cleaned with cool white or pure water rinse clean, winter temperature is low, it is recommended that the lenses rinse with water close to room temperature, if wearing the lenses out or parents to bring the lenses to the unit cleaning, do not immediately clean the lenses after entering the room temperature is low, at least half an hour, then open the cleaning, and rinse the lenses with clean water at room temperature. 4, the edge of the lens is relatively thin, keratomileusis is larger than the diameter of the general hard lens, when put into the box should be put in the box groove with hand support; take out the same support box groove to prevent damage to the edge of the lens. When you stop wearing them, how to save the lenses When children have fever, cold or eye inflammation, they need to temporarily stop wearing keratoplasty lenses, or if parents go on business trips or children’s military training, go out, etc., may stop wearing them for a period of time, then how to save the lenses, vision is not good in the case of choosing how much degree of frame glasses? 1, if stop wearing within 3 days, the lens soaked in the care solution, do not need to change the care solution. 2, if stop wearing more than 3 days, within two weeks. You need to change fresh care solution once in 3 days, and clean the lenses once with care solution. 3. If you stop wearing the lenses for more than 2 weeks, you can consider putting them in dry storage. The lenses should be cleaned and dried, the case solution should be emptied and rinsed with pure water and dried, then the lenses should be put into the case and tightened and covered. When you are ready to wear them again, pour the case full of care solution, soak the lenses for 6 hours or more, and clean them with detergent before wearing them.