Surgically induced astigmatism after phacoemulsification with and without correction for posture-related ocular cyclotorsion

Dooley, Ian; Charalampidou, Sofia; Malik, Arhsed; Ormonde, G O; Loughman, James; Molloy, Laura; Beatty, Stephen

doi:10.1016/j.jcrs.2009.10.033

Cited by 5 publications

(3 citation statements)

References 16 publications

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“…Satisfaction of these criteria was determined by inputting keratometry readings and anticipated surgically induced astigmatism [5] into the Alcon website (www.acrysoftoriccalculator.com), which outputs anticipated post-operative corneal astigmatism were a non-toric IOL to be used. The Tecnis ® toric calculator (www.tecnistoriccalc.com) was used to determine the appropriate ZCT to minimise post-operative corneal astigmatism while avoiding axis flip.…”

Section: Methodsmentioning

confidence: 99%

“…Procedures were performed using standard technique, [5] with review two weeks following an uneventful procedure [6]. Post-operative data included: post-operative complications; refractive status (auto-refraction, and best corrected subjective refraction performed by the patient’s optometrist [four weeks post-operatively, and at least two weeks following removal of any corneal suture]).…”

Section: Methodsmentioning

confidence: 99%

“…To study large numbers of procedures, however, standard arithmetic analysis of cylindrical magnitude does not quantify the direction component of the astigmatism. Vector analysis treats cylinder as a vector with magnitude and direction, expressing refractive error as sphere/cylinder X-axis, allowing comparison of multiple vectors [5].…”

Section: Methodsmentioning

confidence: 99%

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Introduction of a Toric Intraocular Lens to a Non-Refractive Cataract Practice: Challenges and Outcomes

Kirwan¹,

Nolan

Stack

et al. 2016

Int J Ophthalmol Clin Res

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Aim To identify challenges inherent in introducing a toric intraocular lens (IOL) to a non-refractive cataract practice, and evaluate residual astigmatism achieved and its impact on patient satisfaction. Methods Following introduction of a toric IOL to a cataract practice with all procedures undertaken by a single, non-refractive, surgeon (SB), pre-operative, intra-operative and post-operative data was analysed. Attenuation of anticipated post-operative astigmatism was examined, and subjectively perceived visual functioning was assessed using validated questionnaires. Results Median difference vector (DV, the induced astigmatic change [by magnitude and axis] that would enable the initial surgery to achieve intended target) was 0.93D; median anticipated DV with a non-toric IOL was 2.38D. One eye exhibited 0.75D residual astigmatism, compared to 3.8D anticipated residual astigmatism with a non-toric IOL. 100% of respondents reported satisfaction of ≥ 6/10, with 37.84% of respondents entirely satisfied (10/10). 17 patients (38.63%) reported no symptoms of dysphotopsia (dysphoptosia score 0/10), only 3 respondents (6.8%) reported a clinically meaningful level of dysphotopsia (≥ 4/10). Mean post-operative NEI VF-11 score was 0.54 (+/-0.83; scale 0 – 4). Conclusion Use of a toric IOL to manage astigmatism during cataract surgery results in less post-operative astigmatism than a non-toric IOL, resulting in avoidance of unacceptable post-operative astigmatism.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%