Is an orthokeratology lens also a contact lens?

Orthokeratology lens was first born in the United States as a hard contact lens made of RGP material. Together with the more common soft contact lenses, it is classified as contact lenses and is a medical device officially approved for use. The design of orthokeratology lens is more special, worn at night during the day, you can no longer wear any other glasses. The orthokeratology lens adds high oxygen permeability, such as fluorine and silicon, which makes it elastic but harder than soft contact lenses, with strong light transmittance and moisturizing properties.

Orthokeratology lens is one of the most effective correction means to delay the axial growth of the eye and control the development of myopia by physically remodeling the cornea and changing the shape of the cornea. Although its correction effect can continue for a certain time, but still belongs to a temporary change, when the cornea will become back to myopia, so this does not belong to a treatment.

The biggest advantage of orthokeratology lens is that it is highly permeable, especially compared with soft contact lenses, so we do not have to worry about the safety of wearing at night. Orthokeratology lens can wear the age range of large, minors will choose to prepare this type of lens, can effectively control adolescent myopia. Soft contact lenses only have a corrective effect when wearing, do not wear any corrective effect, and easy to cause inflammation, wearing hard contact lenses do not have this kind of trouble, and its diameter is small, easy to wear, health and safety.

However, orthokeratology lenses are not all without their drawbacks. Orthokeratology lens has a complete and standard examination process, because it is a quantitative "eye" customization, so there are many examination items, in addition to the routine refractive examination, fundus intraocular pressure and tear function examination, there are other combined examination items. Therefore, its inspection period is very long, and the price is expensive, can only be prepared to a professional qualified eye hospital, but also comply with the review system, regular return visit evaluation, from the inspection to wear to review the whole process is relatively cumbersome, usually the price of a pair of lenses in 4000-8000 yuan.

Due to the hard texture, the orthokeratology lens is relatively simple to wear and easy to use, but the adaptation period may be as long as one month, and it is easy to have obvious foreign body sensation. But in the nursing steps, it is basically the same as the soft contact lenses, minors should be worn by the parents to do a good job of cleaning.