Scheimpflug topographical changes after  Femtosecond LASIK for mixed  astigmatism – theoretical aspects and case study

Tăbăcaru, Bogdana; Stanca, Horia Tudor

doi:10.22336/rjo.2017.13

Cited by 4 publications

(4 citation statements)

References 4 publications

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“…Laser refractive surgery techniques and technology have undergone continuous advancements in the last decades, being increasingly precise and highly predictable (1,2,31,32). Although small incision lenticule extraction (SMILE) is the newest and promising refractive technique with controversial advantages (31), LASIK is still currently the most popular refractive procedure worldwide, as it can be used to correct all types of ametropias, between large diopters limits (1,2,(33)(34)(35). The essential step of LASIK is the corneal flap creation which is performed nowadays in the most modern way, assisted by a femtosecond laser (1,33).…”

Section: Discussionmentioning

confidence: 99%

Intraoperative flap‑related complications in FemtoLASIK surgeries performed with Visumax� femtosecond laser: A ten‑year Romanian experience

et al. 2020

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Incidence and clinical results of intraoperative flap and interface-related complications were investigated after Femtosecond-LASIK surgery, where flap creation was performed with VisuMax ® femtosecond laser. A retrospective 10-year cohort study was conducted including all eyes treated for all refractive errors by Femtosecond-LASIK technique. All the flaps were made by the same refractive surgeon with the VisuMax ® (Carl Zeiss Meditec) femtosecond laser. We report the intraoperative flap and interface-related complications in these eyes, also describing their management. The study included 4,032 eyes. Flap and interface-related complications were: opaque bubble layer (OBL) 21.18%, suction loss 1.29%, difficult docking 0.69%, difficult dissection of the flap 0.59%, bleeding from limbal blood vessels 0.35%, de-epithelialization of the flap 0.12%, and interface debris 0.025%. These situations were appropriately addressed, with favorable outcomes. Flap creation is an important step in LASIK surgery. The predictability and safety have improved since the flap incision is assisted by a femtosecond laser, but complications of the flap and interface can still occur during the flap creation. Refractive surgeons should be aware and properly manage any unusual situation.

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Section: Discussionmentioning

confidence: 99%

Intraoperative flap‑related complications in FemtoLASIK surgeries performed with Visumax� femtosecond laser: A ten‑year Romanian experience

et al. 2020

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“…Careful preoperative ocular examination was performed. The presence of corneal astigmatism was identified by automated keratorefractometry and confirmed by Scheimpflug-based corneal tomography, a method that investigates both the anterior and posterior surface of the cornea [8].…”

Section: Discussionmentioning

confidence: 99%

Toric intraocular lens implantation – atypical cases

Lazar

Tăbăcaru

Stanca

et al. 2020

rjo

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Objective: To describe the results of toric intraocular lens (IOL) implantation in three atypical cases (four eyes) with cataract and corneal astigmatism: one with bilateral keratoconus, one with pellucid marginal degeneration and one with buphthalmos due to congenital glaucoma. Methods: Three patients (four eyes) with corneal astigmatism (one with bilateral keratoconus, one with pellucid marginal degeneration and one with buphthalmos due to congenital glaucoma) underwent cataract surgery by standard phacoemulsification and the implantation of toric IOLs in the capsular bag. The presence of corneal astigmatism was identified by automated keratometry and confirmed by Scheimpflug-based corneal tomography. The toric IOL implanted in all cases was a single-piece AcrySof Toric IOL (Alcon Laboratories, Inc.). Postoperative visual acuity, the reduction in the refractive astigmatism, the spherical equivalent (SE) and the rotational stability of the toric IOL were recorded for all the patients. Results: Visual acuity increased and the refractive astigmatism decreased in all cases. In Case 1, the right eye achieved a postoperative uncorrected visual acuity (UCVA) of 20/ 20, a decrease in the refractive astigmatism from -3 DCyl to -0.75 DCyl and a spherical equivalent (SE) of -0.25. The left eye presented with a best-corrected visual acuity (BCVA) of 20/ 20, a decrease in the refractive astigmatism from -1.50 DCyl to -1.25 DCyl and a SE of -0.25. In Case 2, the postoperative UCVA was 20/ 20, with a decrease in the refractive astigmatism from -5.5 DCyl to -1 DCyl and a SE for the right eye of 0.00 D. In Case 3, the postoperative BCVA was 20/ 20, with a decrease in the refractive astigmatism from -4.75 DCyl to -1.50 DCyl and a SE of +1.25. No misalignment of the axis of the toric IOL was observed in any patient at subsequent follow-ups. The postoperative visual acuity was satisfactory for all the patients. Conclusions: Toric intraocular lenses can be an effective option for implantation in patients with cataract and corneal astigmatism in atypical situations such as mild to moderate keratoconus, pellucid marginal degeneration and buphthalmos due to congenital glaucoma. Predicting the refractive outcome is difficult in atypical cases and the surgeon should have accuracy and consistency in the preoperative measurements, for achieving satisfactory postoperative results.

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“…Modern capture and analysis systems that combine the Scheimpflug rotating camera, the Placido disk and the slit scanning, such as the Galilei ® (Ziemer, Switzerland) and Sirius ® (Schwind Eye-Tech-Solutions, Germany), were created to combine the advantages of topographers and tomographers [1,10].…”

Section: Current Technologies Of Corneal Topographymentioning

confidence: 99%

Corneal topography in preoperative evaluation for laser keratorefractive surgery – a review

Tăbăcaru

Stanca

2020

rjo

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Corneal topography is a mandatory investigation in the preoperative evaluation of the patient candidate for laser keratorefractive surgery, in order to assess the corneal shape, to determine the radii of curvature and the corneal thickness. Abnormal corneal topography is the most important identifiable risk factor for corneal ectasia. This paper reviews the principles of successive generations of topographers and illustrates several normal and abnormal corneal topographies.

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Scheimpflug topographical changes after Femtosecond LASIK for mixed astigmatism – theoretical aspects and case study

Cited by 4 publications

References 4 publications

Intraoperative flap‑related complications in FemtoLASIK surgeries performed with Visumax� femtosecond laser: A ten‑year Romanian experience

Intraoperative flap‑related complications in FemtoLASIK surgeries performed with Visumax� femtosecond laser: A ten‑year Romanian experience

Toric intraocular lens implantation – atypical cases

Corneal topography in preoperative evaluation for laser keratorefractive surgery – a review

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