For keratoconus wearers, winter is the season when lens care is more demanding. Especially in the north, winter is a time of very low temperatures and dry air, which makes it easy to be perfunctory. The key to winter care for keratoconus lies in diligence and rigor. In winter, some keratoconus lenses will be a bit fidgety when cleaning because they are afraid of the cold. Incomplete cleaning will cause impurities and sediments to remain on the lenses, which will not only pose a potential problem for the next wear, but also shorten the service life of keratoconus lenses. At the same time, it is more important to pay attention to the regular care of the clean box in winter. Because, while keratoconus lenses have to be cleaned every day, the clean box can easily be neglected so that it ends up being a dead zone for cleaning. In this way, the lenses can also become contaminated when they are stored. When it comes to the cleaning of keratoconus lenses, it is also important to pay attention to the temperature of the water. During the winter months, purified water may be cooler and should be kept between 10 and 20 degrees Celsius. This is not difficult and does not need to be measured with a thermometer, it is just enough to keep it in line with the room temperature. If the water is too cold, it may cause the lenses to become brittle and break easily. Also, winter is a time of high incidence of colds. If the wearer has a cold, stop wearing them temporarily. If the wearer is forced to wear the lenses during the cold period, firstly, the wearing effect will be affected, and secondly, the virus may hide in the lenses, which will have a bad effect on the future wearing. Therefore, it is important to wait until the cold gets better before continuing to wear the lenses.