Paired opposite Clear Corneal Incision: Time-Related Changes of its Effect and Factors on which those Changes Depend

Németh, Gábor; Kolozsvári, Bence Lajos; Berta, András; Módis, László

doi:10.5301/ejo.5000428

Cited by 15 publications

(9 citation statements)

References 28 publications

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“…The mean magnitude of TIA was 1.370 AE 0.384 D in the CCI group and 1.370 AE 0.505 D in the OCCI group that was similar to preoperative topographic astigmatism. The mean magnitude of SIA was 0.403 AE 0.183 D in our CCI group, which was less than Khokhar's study (0.85 AE 0.75 D) 11 and Nemeth's study (0.61 AE 0.43 D) 14 but more than Bazzazi's study (0.036 AE 0.51 D) 13 and Bhalla's study (0.33 AE 0.22 D). 9 Regarding the OCCI group of our study, the mean magnitude of SIA was 0.849 AE 0.519 D, which was less than that of Lever and Dahn's study (2.25 D), 5 Tedros' study (1.57 D), 12 Qammar and Mullaney's study (2.10 D), 10 Nemeth's study (0.99 D) 14 and Khokhar's study (1.66 D).…”

Section: Discussioncontrasting

confidence: 66%

“…The mean magnitude of SIA was 0.403 AE 0.183 D in our CCI group, which was less than Khokhar's study (0.85 AE 0.75 D) 11 and Nemeth's study (0.61 AE 0.43 D) 14 but more than Bazzazi's study (0.036 AE 0.51 D) 13 and Bhalla's study (0.33 AE 0.22 D). 9 Regarding the OCCI group of our study, the mean magnitude of SIA was 0.849 AE 0.519 D, which was less than that of Lever and Dahn's study (2.25 D), 5 Tedros' study (1.57 D), 12 Qammar and Mullaney's study (2.10 D), 10 Nemeth's study (0.99 D) 14 and Khokhar's study (1.66 D). 11 On contrary, the mean SIA of our OCCI was higher than that of Bazzazi's study (0.505 D), and Bhalla's study (0.76 D).…”

Section: Discussioncontrasting

confidence: 66%

“…13 In addition, Nemeth's study found a 0.13 D reduction in topographic astigmatism in their CCI group, which was less than our CCI group (0.265 D), while Nemeth's OCCI group showed a reduction in topographic astigmatism of 0.2 D versus 0.665 D in our study. 14 Using vector analysis, 15 we also evaluated the predictability of the astigmatic correction. The topographic data were analyzed.…”

Section: Discussionmentioning

confidence: 99%

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Incisional correction of corneal astigmatism during ‎phacoemulsification – a randomized trial

et al. 2021

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Background: Phacoemulsification is regarded as a type of refractive surgery by which it is possible to ‎reduce pre-existing corneal stigmatism.‎ This study aimed to evaluate the efficacy and safety of on-axis corneal incision with or without opposite clear corneal incisions (OCCI) to correct preoperative corneal astigmatism during uncomplicated phacoemulsification ‎surgeries.‎ Methods: A randomized, prospective, parallel two-arm interventional study, which included a ‎total 40 eyes from 40 patients, was conducted.‎ Patients were divided into two groups: 20 patients as controls underwent phacoemulsification with on-axis incision (CCI group), and 20 patients underwent phacoemulsification with OCCI (OCCI group). Results: Mean astigmatic correction was significantly higher in the OCCI group (0.665 vs 0.265 diopters, p-value <0.001), compared to the CCI group. Most of the parameters (surgical induced astigmatism, magnitude of error, and correction index) were significantly higher in the OCCI group compared to the CCI group (p-value <0.01). There were no ‎incision-related complications. Conclusions: Both incisional methods are useful methods for correction of preoperative corneal ‎astigmatism but OCCIs correct a higher amount of astigmatism than the on-axis clear ‎corneal incision.‎ Registration: ClinicalTrials.gov NCT04418986 (05/06/2020).

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Section: Discussioncontrasting

confidence: 66%

Section: Discussioncontrasting

confidence: 66%

Section: Discussionmentioning

confidence: 99%

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Incisional correction of corneal astigmatism during ‎phacoemulsification – a randomized trial

et al. 2021

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“…There are several methods for treating coexisting astigmatism in patients undergoing cataract surgery. These methods include steep meridian incision, 5 , 6 opposite clear corneal incisions, 5 , 7 – 9 toric intraocular lens (IOL), 10 – 12 and limbal or corneal relaxing incisions. 12 – 14 Nowadays, femtosecond laser platforms can improve the precision of corneal incisions.…”

Section: Introductionmentioning

confidence: 99%

Comparison Between Digital and Manual Marking for Toric Intraocular Lenses

Elhofi

Helaly

2015

Medicine

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To compare the clinical outcome of digital and manual marking for toric intraocular lens (IOL) alignment.This is a prospective clinical study that included 60 eyes of 60 patients undergoing cataract surgery with coexisting corneal astigmatism more than 1 diopter (D). The eyes were randomly assigned to either digital image guidance using VERION digital marker (Alcon Laboratories, Ft. Worth, TX) or manual slitlamp-assisted preoperative marking using pendulum-attached marker. Tecnis toric IOL (Abbott Medical Optics, Inc, Santa Ana, CA) was implanted in all cases.The mean postoperative uncorrected distance visual acuity (UCDVA) for the digital-marking group was 0.12 + 0.12 logMAR, and for the manual-marking group was 0.18 + 0.14 logMAR (P = 0.104). The mean deviation from targeted induced astigmatism (TIA) for the first group was 0.10 + 0.08 D and for the second group was 0.20 + 0.14 D (P = 0.001). The mean postoperative toric IOL misalignment measured by the slitlamp was 2.4° + 1.96° for the first group and was 4.33° + 2.72° for the second group (P = 0.003).Accurate alignment of the toric IOL is important to achieve the desired astigmatism correction. VERION system has the advantage of preoperative planning and intraoperative digital guidance of the toric IOL alignment. The use of VERION system resulted in less postoperative deviation from TIA and showed less postoperative toric IOL misalignment than using manual-marking technique.

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“…(2) Although the patient's cornea had 1.4 D with-the-rule astigmatism, studies have shown that after the production of a symmetric transparent corneal incision on the steep axis of the cornea, a 2.8-3.5 mm clear corneal incision could correct 1.00-2.06 D of astigmatism [3][4][5]. Based on the surgeon's previous surgical experience, it was considered that astigmatism could be reduced to less than 1.0 D through the symmetric incision on the steep axis of the cornea.…”

Section: Discussionmentioning

confidence: 99%

Special Cases in Cataract Surgery

Deng¹,

Song²,

Wang³

2021

Current Cataract Surgical Techniques

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During phacoemulsification for cataracts, the surgeon may encounter various challenges and should therefore be trained to handle them. This chapter will share an example of clinical cases encountered by the author in clinical practice, which mainly includes the successful implantation of a trifocal intraocular lens in the capsular bag after posterior capsular tear during posterior polar cataract surgery as well as cataract surgery design after corneal refractive surgery, shrinkage, and treatment of capsular opening in patients with retinitis pigmentosa after cataract surgery to provide a reference for clinicians.

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Paired opposite Clear Corneal Incision: Time-Related Changes of its Effect and Factors on which those Changes Depend

Cited by 15 publications

References 28 publications

Incisional correction of corneal astigmatism during ‎phacoemulsification – a randomized trial

Incisional correction of corneal astigmatism during ‎phacoemulsification – a randomized trial

Comparison Between Digital and Manual Marking for Toric Intraocular Lenses

Special Cases in Cataract Surgery

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