difficulties in full femtosecond (4) lens residue
Let's talk about the front: patients and friends should not be afraid, and don't feel as soon as they hear the complications, alas, why is the operation so unsafe? Do I dare to do it? Here, we systematically talk about the unexpected situations that may occur in the following operations and the ways to deal with them. They exist, but it doesn't mean that the probability is high.
All-femtosecond surgery needs to take out the lens, but for various reasons, the lens is torn or the lens tissue is not taken out completely.
(1) the laser energy is abnormal
(2) the lens is too thin
(3) the operation is not standardized
Treatment method:
If there is tissue residue, it should be removed in principle, especially in the optical correction area. But what if only a tiny strip of tissue remains at the edge? (for example, the length is within 1 ~ 2 mm and the width is within 1 mm), and it can be observed outside the optical zone.
Xi 'an Full Femtosecond Surgery Hospital-Xi 'an Huaxia Eye Hospital
Difficulty of Full Femtosecond (5) Eccentricity of lens
Let's talk about the front: patients and friends should not be afraid, and don't feel as soon as they hear the complications, alas, why is the operation so unsafe? Do I dare to do it? Here, we systematically talk about the unexpected situations that may occur in the following operations and the ways to deal with them. They exist, but it doesn't mean that the probability is high.
reasons:
(1) there is a large kappa angle
(2) the patient did not cooperate well, and his gaze was poor
(3) his counterpoint was poor
Treatment methods:
(1) if eccentric counterpoint occurs, the negative pressure can be released and the counterpoint can be re-established before the laser scanning starts.
(2) If the laser cuts the bottom of the microlens <: 1%, laser scanning can be suspended and re-aligned. Re-alignment scanning is prone to dislocation of peripheral scanning, which leads to incomplete and damaged lens separation and removal, which should be paid attention to.
(3) If most of the cutting has been completed, but the eccentricity is obvious, the operation should be terminated immediately, and it is not appropriate to separate the lens, and the next step should be carried out according to the situation.
(4) The obvious eccentricity has been corrected by surgery, such as corneal topography-guided surgery or wavefront aberration-guided surgery.
(5) Patients with large kappa angle should be cautious. It is suggested to refer to the corneal apex for the central alignment of the operation.
Director Cao Wenjuan, an expert in all-femtosecond surgery in Xi 'an
Difficulties in all-femtosecond surgery (6) Difficulties in finding lenses
In the process of teaching, some doctors in the same profession said that it was sometimes too difficult to find lenses, which led to prolonged operation time. My analysis may be due to the following reasons:
(1) the corneal lens is too thin
(2) the operation is not skilled
(3) it is not standardized or abnormally separated
Treatment methods:
(1) Carefully search the edge of the microlens with the relatively sharp SMILE separation hook.
(2) Magnify the operating microscope or turn on the attached slit lamp to confirm the position of the lens.
(3) Anterior segment OCT was used to measure the thickness of cornea and observe the surgical scanning trace to confirm the position of microlens.
(4) If the lens can't be found, the incision can be closed temporarily, and the separated tissue can be reset smoothly. After several months, superficial surgery or FS-LASIK and other methods can be performed.
price and cost consultation of Xi' an full femtosecond surgery: lzhxyk.