What knowledge do I need to know to buy contact lenses?
The importance of eyes to a person is self-evident, and contact lenses are things that need to be worn all the time in the eyes. Naturally, when you first buy, you have to use twelve points of seriousness. So, what do you need to know when buying contact lenses for the first time?
If you are wearing contact lenses for the first time, you should go to the ophthalmology hospital for optometry and evaluation to check whether the eye conditions are suitable for contact lenses. It is very important to understand the eye data. The curvature of the cornea determines the choice of the base arc, and the correct correction can achieve the best correction effect, so as to ensure the wearing comfort.
Contact lenses have different life cycles, which are equivalent to the shelf life of the lenses after unpacking. Among them, the daily sell-off is special and only for single use. The other lenses need to be scrubbed after each removal to remove protein deposits attached to the lenses, and then soaked in fresh care solution for preservation.
Moisture content is an important parameter, but not the higher the better. Although high-moisture lenses are more soft and comfortable, for people with less tear secretion and eyes that are prone to dryness, the excessively high moisture evaporates faster, and then supplemented with tears, which makes the eyes dry and uncomfortable.
At present, contact lenses are generally divided into two types of materials, hydrogel and silicon hydrogel. Hydrogels are used for annual and semi-annual polishing, but silicone hydrogels can only be used to make short-cycle disposable lenses due to their material properties. High-oxygen-permeable, short-cycle silicone hydrogel contact lenses are healthier and safer, but due to the slightly harder texture, wearers with sensitive eyes are prone to foreign body sensations.
It is easy to get rid of the world with "frames", but contact lens care is a long-term job. In order to ensure eye safety, contact lens wearing and care methods are knowledge that must be mastered.