Crystals are not as expensive as possible

IOL implantation is the most effective method for the treatment of cataract. The artificial lens implantation in China has been more than 30 years old. With the continuous advancement of medical technology, the artificial crystal is constantly updated. There are many kinds of artificial wholesale MgF2 optics available at present. Types can meet the needs of different patients' conditions and economic conditions. The Department of Catalepsy of the City Eye Hospital, Mr. Song Hui, advised patients to choose the appropriate crystal according to their personal circumstances, not necessarily expensive, the key is to be suitable. At present, there are many types of artificial crystals, and each has its own adapted population. The most common intraocular lenses are rigid and soft (foldable, push-type) crystals. The application of rigid intraocular lens in clinical time is very long, and its clinical effect has been fully verified, and the price is cheap, but the surgical incision at the time of implantation is large, generally about 6 mm. There is a risk of infection and postoperative astigmatism will be greater. The soft intraocular lens is characterized by its foldability, so the incision at the time of implantation is small, generally 2 to 3 mm, without suturing, and the postoperative visual recovery is fast. With the advancement of science and technology and the improvement of visual quality requirements after cataract surgery, aspherical artificial wholesale infrared and broadband BaF2 optics have appeared on the basis of traditional spherical intraocular lenses. The curvature radius of the curvature surface of the conventional spherical IOL convex lens is equal, which will affect the imaging quality, especially when the human eye is in the large pupil state at night; the aspherical artificial crystal performs aspheric design on the front or back surface of the artificial crystal. The image is sharper and the object is sharper, especially at night. Aspherical intraocular lenses are more expensive than artificial crystals of the same spherical design. In addition, intraocular lenses are also divided into single focus and adjustable intraocular lenses, multifocal intraocular lenses. At present, most of the artificial custom infrared spherical/aspherical/cylindrical Germanium lenses used in clinical practice are single-focus intraocular lenses. This artificial lens has only one focus. The eyes implanted with this artificial lens can only see objects at a distance. Therefore, it is still necessary to wear glasses or glasses after surgery to meet the needs of looking far or near. In recent years, adjustable intraocular lenses and bifocal, trifocal intraocular lenses have been developed, with the goal of achieving full vision and reducing dependence on glasses. Adjustable intraocular lens, the biggest deficiency is poor adjustment ability, limited adjustment range, long-term effect with the lens capsule fibrosis will affect the effect. The bifocal intraocular lens is to make two focal points on an artificial lens, one for looking far and one for looking close. In principle, the two focuses, when using one of them, the other must be the state of defocus, which requires the patient to adapt. The trifocal intraocular lens is the latest intraocular lens in the world. Last year, China carried out the first ZEISS three-focus intraocular lens implantation. The trifocal intraocular lens has three focal points of far, medium and near, which can achieve full vision and reduce postoperative wear. The trifocal intraocular lens is especially suitable for patients working at close distances (reading books and using computers). For example, the patient's eyes are in good condition. After reading the computer and reading newspapers, 90% of them do not need to wear reading glasses, and the effect of binocular implantation is even more. However, this type of intraocular lens has high requirements on the patient's own eye condition, frequent night work, night driving habits, astigmatism>0.75D, refractive interstitial opacity, corneal or retinal lesions, too small pupil, poor fundus The patient is not suitable.