Dataset Information

Posterior capsule dynamics during femtosecond laser lens fragmentation.

ABSTRACT:

Purpose

The dynamics of the posterior capsule during femtosecond laser lens fragmentation has received little attention in the literature. We analysed the movements of the posterior capsule to identify the rupture risk factors, if any, and to suggest possible modification of the laser spot energy pattern during fragmentation.

Materials and methods

Posterior capsule ruptures during fragmentation were identified over a 10-year period of femtosecond laser use. In addition, the dynamics of the posterior capsule were identified through the real-time swept-source OCT lateral view available during the surgeries.

Results

Out of the 1465 laser cataract procedures performed, we recorded 1 case of posterior capsule rupture during lens fragmentation, which was caused by eye movement that was detected but ignored by the surgeon. Three types of posterior capsule dynamics were identified, all related to a gas bubble formation during the first part of the lens fragmentation. In eyes with a hard nucleus, the concussion of the posterior capsule was evident, however, with no capsule rupture.

Discussion

Maintaining good docking throughout the whole procedure seems important in avoiding a posterior capsule cut by the femtosecond laser. In addition, a Gaussian pattern of spot energy is suggested when fragmenting hard cataracts.

SUBMITTER: Bellucci C

PROVIDER: S-EPMC10400471 | biostudies-literature | 2023 Sep

REPOSITORIES: biostudies-literature

ACCESS DATA

Publications

Posterior capsule dynamics during femtosecond laser lens fragmentation.

Bellucci Carlo C Mora Paolo P Tedesco Salvatore Antonio SA Bellucci Roberto R Gandolfi Stefano S

International ophthalmology 20230516 9

<h4>Purpose</h4>The dynamics of the posterior capsule during femtosecond laser lens fragmentation has received little attention in the literature. We analysed the movements of the posterior capsule to identify the rupture risk factors, if any, and to suggest possible modification of the laser spot energy pattern during fragmentation.<h4>Materials and methods</h4>Posterior capsule ruptures during fragmentation were identified over a 10-year period of femtosecond laser use. In addition, the dynami ...[more]

PMID: 37191929

Similar Datasets

Project description:Purpose To evaluate capsulotomy shape and posterior capsule opacification (PCO) during an 18-month follow-up for bimanual femtosecond laser-assisted cataract surgery (FLACS). Methods 74 eyes operated by a well-trained surgeon with bimanual FLACS technique using low-energy LDV Z8 (Ziemer Ophthalmic Systems AG, Port, Switzerland) were included in the study. The follow-up period was 18?±?2 months. Another 91 eyes, which underwent standard bimanual microincision cataract surgery (B-MICS), served as a control group. In all cases, a BunnyLens AF (Hanita Lenses, Israel) intraocular lens was implanted in the bag. A digital image of the capsule with slit-lamp retroillumination was performed in all patients at 18 months of follow-up. Image analysis software (ImageJ) was used to evaluate the shape of the capsulotomy in terms of diameter, area, and circularity. PCO score was evaluated using EPCO 2000 software. Best corrected visual acuity (BCVA) and endothelial cell count (ECC) were evaluated before and after surgery at 1 and 18?±?2 months. Results At 18 months, mean capsulotomy diameter was 5.34?±?0.21?mm while capsulorhexis was 5.87?±?0.37?mm (p < 0.001) and the deviation area from baseline was 1.13?±?1.76?mm2 in FLACS and 2.67?±?1.69?mm2 in B-MICS (p < 0.001). Capsulotomy circularity was 0.94?±?0.04 while capsulorhexis was 0.83?±?0.07 (p < 0.001). EPCO score was 0.050?±?0.081 in the FLACS group and 0.122?±?0.239 in the B-MICS group (p=0.03). The mean BCVA improvement was significant in both groups, without a significant difference at 18 months. We noticed a statistically significant difference in endothelial cell loss at 18 months (FLACS 12.4% and B-MICS 18.1%; p=0.017). Conclusions Bimanual FLACS is a safe and effective technique, as determined in a long-term follow-up. Capsulotomy shape presented higher stability and circularity in the FLACS group over the 18-month observation period. FLACS resulted in lower PCO scores and endothelial cell loss at 18 months in comparison to B-MICS standard technique.

Dataset Information

Posterior capsule dynamics during femtosecond laser lens fragmentation.

Purpose

Materials and methods

Results

Discussion

Publications

Posterior capsule dynamics during femtosecond laser lens fragmentation.

Similar Datasets

OmicsDI is part of the ELIXIR infrastructure

Tweets