Lens implantation procedures include ICL lens implantation and TICL with astigmatism lens implantation. The subtle difference between the two of them is reflected in whether or not they need to maintain a specific "angle" after implantation.
How is the lens fixed in the eye?
ICL crystals have four corners and are "fixed". When the ICL lens is pushed into the eyeball from the curled state, it will automatically unfold, and the doctor will move the ICL lens to the corresponding angle according to the patient's preoperative examination data, and then the four corners of the ICL lens will be stuck in the ciliary sulcus.
The position of the ciliary sulcus, between the root of the iris and the ciliary process of the posterior chamber, is an acute angle depression groove, and the ICL lens "stuck" is just embedded here, and it is very firm.
The ICL lens has its own small hole, the aqueous humor can pass freely, the ICL lens will not affect the normal circulation in the eye after it is stuck and fixed, and the semi-arc shape of the ICL lens fixed behind the ciliary sulcus will not be easily changed, which is relatively stable.
Astigmatism crystals have angle problems?
There is no angle problem in ICL lenses implanted in people without astigmatism, but TICL lenses are tailored according to the patient's astigmatism axis and astigmatism, and the correction of astigmatism depends on the correction of the axial position, and the angle is particularly important.
Before preparing for surgery, the surgeon will mark the patient's cornea axially, and after the lens is implanted in the eye, the surgeon will adjust the lens to match the direction and angle to correct astigmatism. If the rotation angle of the TICE crystal is too large (more than 10°), it will reduce its astigmatism correction effect, and even cause irregular astigmatism, which will affect the visual quality.
Are ICL TICE crystals stable?
The ICL lens has its own small holes, the aqueous humor can pass freely, the lens will not affect the normal circulation in the eye after it is stuck and fixed, and the semi-arc shape fixed behind the ciliary sulcus will not be easily changed, which is very stable. That is, in the vast majority of cases, the crystals do not rotate.
In rare cases, such as traumatic impacts, strenuous exercise during recovery, or crystal size problems, slight rotation may occur. However, this rotation does not have any effect on patients with non-astigmatism lenses, and there is no axial angle problem with ICL; For patients with astigmatism lenses, it can be solved by the doctor repositioning the TICL lens or replacing the lens.