Xi'an Huaxia Ophthalmology: 3 risks in femtosecond surgery that must be guarded against!

Are there any risks in total femtosecond surgery? What should I do if there are risks during femtosecond surgery? Common complications during full-minute surgery include: loss of negative pressure during scanning, lens separation and misalignment, and black spots in the scanning area. Xi'an Huaxia Eye Hospital will help you understand.

Risk 1. Negative pressure aspiration

Due to excessive fluid on the corneal surface, poor fixation of the patient or sudden eyeball rotation, conjunctiva embedded in the gap between the negative pressure cone lens and the cornea, etc. During the femtosecond laser scanning process, the negative pressure is lost, causing the laser scanning to terminate on its own.

The processing method is as follows:

(1) The laser performs the bottom cutting process of the microlens; at 10 o'clock, the negative pressure is lost and scanning can be restarted. At this time, the machine will automatically pop up the selection menu of whether to perform a quick restart, select continue, and the original treatment plan will not be modified in any way.

(2) If the laser microlens bottom cutting progresses >10 and the negative pressure is lost when approaching the central axis area, it is recommended to temporarily terminate SMILE and change to FS-LASIK or perform SMILE at an scheduled time.

(3) If the lens bottom cutting process has been completed and the negative pressure is lost when side cutting the lens, you can restart the laser scanning from the side cutting (pay attention to alignment) or reduce the side cutting diameter of the lens by 0.2~0.4 mm. .

(4) If the lens bottom cutting process has been completed and the side cutting is completed, and the negative pressure is lost during the corneal cap scan, the cap can be remade without changing the original treatment parameters, but at this time, attention must be paid to the center alignment .

(5) When the negative pressure is lost when scanning the peripheral incision, the original treatment parameters can be re-scanned or mechanical incision can be made without changing the original treatment parameters. Pay attention to try to align with the original center when re-attracting.

Risk 2. Dark spots in the laser scanning area

During laser scanning, dark areas with different colors from the scanned area may appear in the corneal stroma, which are similar to black spots and are also called black areas. , which is the area where femtosecond laser fails to produce effective effect. Common causes include foreign bodies in the optical path area, corneal epithelial damage, and low laser energy.

Treatment principles:

1. Targeted prevention of the causes of “dark spots”

2. Select treatment based on the location, size, and density of “dark spots” Continue or terminate the operation

3. To continue separation cases, the "black spot" area should be separated first and avoid using sharp instruments for separation. The appearance of black areas in the scanning area will make it more difficult to separate the lens, so the lens must be separated carefully. Excessive separation may cause the tip of the instrument to penetrate the corneal surface, causing the corneal surface to heal irregularly, and even form scars or pannus. , can also cause lens tearing.

4. Stop the surgical case, carefully search for the cause, scan again or postpone the surgery

Risk 3. Corneal lens residue

Due to abnormal laser energy, lens Too thin, severe OBL, dark spots, use of sharp instruments or irregular surgical procedures may lead to lens tearing or incomplete lens tissue removal.

Treatment principles:

1. Optimize surgical design and improve surgical skills (skilled separation techniques, water infiltration separation);

2. Avoid using sharp separation instruments ;

3. Evaluate the remaining lenses. A small number of lens fragments located in the edge area (such as length within 1~2 mm and width within 1 mm) that do not affect visual function do not need to be processed.

4. Larger lens fragments should be removed.

Xi'an Huaxia Eye Hospital

Xi'an Huaxia Eye Hospital is a Xi'an regional all-femtosecond myopia laser surgery hospital under Huaxia Eye Group and a Shaanxi ophthalmology specialist hospital. The German Zeiss VisuMax all-femtosecond laser system introduced in the hospital is favored by myopic people for its safety and comfort.

How much does myopia surgery cost in Xi’an?

Xi'an Huaxia Eye Hospital holds a November promotion, including full femtosecond, half femtosecond, and ICL lens implantation! The special prize for all femtoseconds is 11,111 yuan! Half femtosecond first prize discount of 4,000 yuan! ! ! ICL lens implantation costs 26,800 yuan! ! !

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