Orthokerotology is the process used to treat and reshape the eyes using a special type of contact lenses, which are the nightly contact lenses. From the name itself, the contact lens must be worn at night in order to undergo a non-surgical process during the sleep in order to restore the vision by day time. As soon as the contact lenses are removed in the morning, the cornea will be able to attain its original shape and will stay that way. The effect of this therapy is just temporary, and so the lenses need to be worn every night in order to attain a good vision.
Nightly Contact Lenses Correct Your Refractive Error
Orthokeratology treatment works by correcting your refractive errors so you will be able to see clearly throughout the day, and even achieve a near perfect vision. The nightly contact lenses are made of a gas porous lens, which is a firm kind of plastic material. They press the cornea of your eyes softly and decrease its curve, in order for the focal length to increase.
Not Recommended for Long-sighted Individuals
Medical experts would not recommend the use of nightly contact lenses for people who are suffering from long-sightedness, as well as those that wear bi-focal lenses. The lenses are not also suitable to people who have hypermetropia, since they have soft cornea, and thus, it is more flattening and will just worsen the condition. Moreover, these lenses also help to cure low eyesight problems. There is no harm in continuously wearing the lenses for a week each night, but they must be disposed after a week of using.