Regular and irregular astigmatism after superior versus temporal scleral incision cataract surgery13The authors have no commercial or proprietary interest in any of the companies, products, or methods described in this article.

Oshika, Tetsuro; Sugita, Gentaro; Tanabe, Taro; Tomidokoro, Atsuo; Amano, Shiro

doi:10.1016/s0161-6420(00)00379-1

Cited by 40 publications

(8 citation statements)

References 27 publications

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“…Previous studies have demonstrated that flattening of the cornea occurs along the incisional meridian [14]. This results in WTR astigmatic changes when a temporal incision is used [14,15], consistent with the results of our study.…”

Section: Discussionsupporting

confidence: 92%

“…Our data is comparable to the clear corneal incision data from the study by Bradfield et al , which showed a postoperative astigmatism range of 0-4.50D the first month after surgery [12] however in that study a superior clear corneal incision was used. Some studies have demonstrated that temporal incisions induce less astigmatism than superior wounds [13,14] but others have shown comparable results [14]. …”

Section: Discussionmentioning

confidence: 99%

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Change in Astigmatism After Temporal Clear Corneal Cataract Extraction in the Pediatric Population

Lam¹,

Yen²

2008

TOOPHTJ

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Purpose:To evaluate the early postoperative change in astigmatism in pediatric patients having cataract extraction with intraocular lens implantation using sutured temporal clear corneal incision. Methods: A retrospective chart review was performed on all pediatric patients who underwent clear corneal cataract surgery with intraocular lens implantation between 12/01/2005 and 11/30/2006. Results: A total of 31 eyes of 22 patients who underwent temporal clear corneal cataract surgery and intraocular lens implantation were included. The mean patient age at surgery was 6.05 years (range 1.5 months to 17 years). Mean postoperative refractive astigmatism the first day after surgery was 2.35±1.37 diopters (D). There was a statistically significant decrease in mean postoperative astigmatism by postoperative week 1 to 1.45 ± 0.79 D. Mean astigmatism was 1.48 ± 0.98 D by postoperative months 2-4, which was not a statistically significant change from postoperative day 1. Conclusions: Postoperative astigmatism can be expected after sutured temporal clear corneal surgery in pediatric patients and decreases over time without removal of sutures. The amount of postoperative astigmatism in children requires close follow-up after pediatric cataract surgery.

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Section: Discussionsupporting

confidence: 92%

Section: Discussionmentioning

confidence: 99%

Change in Astigmatism After Temporal Clear Corneal Cataract Extraction in the Pediatric Population

Lam¹,

Yen²

2008

TOOPHTJ

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“…In the present study, we found that temporal incisions create astigmatism with a steep axis toward 90º, while the superior incision with a steep axis tends toward 180º in the anterior cornea, which is consistent with the results after cataract surgery [ 17 , 24 – 26 ]. Furthermore, the change in total cornea astigmatism was similar to that in the anterior cornea, because no significant differences were found for SIA between the anterior and total cornea.…”

Section: Discussionsupporting

confidence: 92%

Analysis of surgically induced astigmatism of the anterior, posterior, and total cornea after implantable collamer lens implantation: a comparative study between temporal and superior clear corneal incisions

Wan,

Chen,

et al. 2024

BMC Ophthalmol

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Background To comparatively analyze the surgically induced astigmatism (SIA) of the anterior, posterior, and total corneas of eyes undertaking implantable collamer lens (ICL) implantation with temporal or superior corneal incisions. Methods One hundred and nine eyes of 109 patients who received ICL implantation were recruited: 40 eyes had temporal incisions and 69 eyes had superior incisions. Total corneal refractive power (TCRP); simulated keratometry of the anterior (Sim-KAnt) and posterior (Sim-KPost) corneal curvature; and astigmatism of the anterior (CAAnt), posterior (CAPost), and total (CATCRP) cornea were recorded through a Pentacam preoperatively and 3 months postoperatively. The SIA of the anterior, posterior, and total cornea were also compared between the two groups. Results There were no significant intergroup differences for TCRP, Sim-KAnt, Sim-KPost, CAAnt, CAPost, or CATCRP, preoperatively. However, values of CAAnt, CAPost, and CATCRP with temporal incision were significantly higher than those parameters with superior incision postoperatively. All of the SIA of the anterior, posterior, and total cornea were significantly lower for temporal incision than those with a superior incision (p < 0.001, p = 0.006 and p = 0.001 respectively). Meanwhile, the superior incisions created against-the-rule (ATR) astigmatism, and temporal incisions always induce with-the-rule (WTR) astigmatism in total cornea. Conclusions A superior incision may be suitable for correcting WTR astigmatism, while a temporal incision for correcting ATR astigmatism when using a non-toric ICL. Meanwhile, temporal incision could be a better choice with little preoperative astigmatism or that preoperative astigmatism would be corrected with toric ICLs. Trial registration Registration number: ChiCTR2100051739. Prospectively registered: 01 October 2021.

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“…5 Oshika T, Sugita G, Tanabe T, Tomidokoro A, Amano S (2000) studied 174 eyes of 87 patients, concluded that superior incision induces slightly ATR astigmatism and temporal incision induces slight WTR astigmatism. 6 Similarly, Gokhale N S, Sawhney S shown that the amplitude of surgically induced astigmatism was higher in superior scleral incision than superotemporal scleral incision than in temporal incision in a study of 45 cases of MSICS in Mumbai in 2005. 7 In a comparative study by RENU et al, a total of 100 eyes were operated forcataract by MSICS.…”

Section: Discussionmentioning

confidence: 94%

Comparision of surgical induced astigmatism between sics superior and sics temporal

Patel¹,

Patel²,

Patel³

2020

IJCEO

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: The aim of this study was to analyze the surgically induced astigmatism in comparison to site of incision superior and temporal in commonly performed SICS technique of cataract surgery. : A prospective interventional study was done on 30 patients who underwent manual small incision cataract surgery (MSICS) divided into two groups namely sics superior group and sics tempral group based on incision-site. The two techniques were compared with respect uncorrected visual acuity, surgically induced astigmatism and type of astigmatism drift. In our study, There was significant difference between techniques regarding best uncorrected visual acuity on 40 post operative day. Greater proportion of patients had good outcomes in both the groups as regards to final visual acuity. Superior incision induced post operative ATR drift (75%) and temporal incision induced WTR astigmatism (70%). : Incision on steep axis is an economical and effective way of reducing pre-existing astigmatism in high-volume and low-cost cataract surgery.

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Regular and irregular astigmatism after superior versus temporal scleral incision cataract surgery13The authors have no commercial or proprietary interest in any of the companies, products, or methods described in this article.

Cited by 40 publications

References 27 publications

Change in Astigmatism After Temporal Clear Corneal Cataract Extraction in the Pediatric Population

Change in Astigmatism After Temporal Clear Corneal Cataract Extraction in the Pediatric Population

Analysis of surgically induced astigmatism of the anterior, posterior, and total cornea after implantable collamer lens implantation: a comparative study between temporal and superior clear corneal incisions

Comparision of surgical induced astigmatism between sics superior and sics temporal

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