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Femtosecond laser-assisted cataract surgery (FLACS)

Eye Care estimated about CNY 12000-22000

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Description

A modern cataract surgical technique using a femtosecond laser to perform key steps—corneal incisions, capsulotomy, and lens fragmentation—enhancing precision, reproducibility, and safety compared to conventional manual phacoemulsification.

Main Uses

FLACS is primarily used to enhance precision and reproducibility in key steps of cataract surgery: 1) Creating corneal incisions (main and side ports) with customizable architecture and self-sealing geometry; 2) Performing circular, centered, and appropriately sized anterior capsulotomies (typically 5.0–5.2 mm diameter); 3) Fragmenting the crystalline lens nucleus to reduce phacoemulsification energy and time; 4) Treating preexisting corneal astigmatism via arcuate or limbal relaxing incisions (LRIs); 5) Improving safety and outcomes in complex cases (e.g., Fuchs endothelial dystrophy, shallow anterior chamber, or intumescent cataracts).

Normal Range

Not applicable —飞秒激光辅助白内障手术 (Femtosecond Laser-Assisted Cataract Surgery, FLACS) is a surgical procedure, not a diagnostic laboratory test. It has no numerical 'normal range' or quantitative biomarker values. Surgical outcomes are assessed qualitatively and quantitatively via postoperative metrics (e.g., corrected distance visual acuity ≥20/25, corneal incision accuracy within ±50 µm, capsulotomy centration error <0.25 mm, effective phacoemulsification time <1.5 min), but these are procedural performance indicators—not patient lab values.

Low Values - Possible Causes

N/A — FLACS does not produce 'low values' in the clinical laboratory sense. However, suboptimal procedural outcomes (e.g., low visual acuity gain, high residual astigmatism, or incomplete capsulotomy) may result from: 1) Poor patient fixation or intraoperative eye movement; 2) Inadequate corneal docking due to shallow anterior chamber or buphthalmos; 3) Opaque cornea or dense cataract limiting laser visualization; 4) Operator inexperience with laser platform calibration or treatment planning; 5) Undiagnosed zonular instability leading to capsular complications.

High Values - Possible Causes

N/A — FLACS is not a quantitative assay with 'high values'. However, elevated procedural risks or adverse events may correlate with: 1) Excessive laser energy causing corneal stromal gas bubbles or transient endothelial cell loss (>10% at 1 month); 2) Overly aggressive fragmentation pattern increasing cumulative dissipated energy (CDE >15 units); 3) High preoperative corneal astigmatism (>3.0 D) complicating toric IOL alignment; 4) Advanced pseudoexfoliation syndrome increasing risk of zonular dehiscence; 5) Prior ocular surgery (e.g., vitrectomy) altering anterior segment anatomy and laser coupling.

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estimated about CNY 12000-22000