Evidence map›Paper›PMID 33751306›Full record

ArticleInternational ophthalmology2021

Effect of the kappa angle on depth of focus after implantation of the TECNIS Symfony intraocular lens.

Jie Luo, Yang Liu, Feng Wang, Ying Su, Xuebing Xiao, Haitao Du, Qiang Guo

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In one paragraph

Article in International ophthalmology, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 6 papers.

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6citing papers in PubMed
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1 · What the graph read from it

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Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

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3 · Its place in the literature

Who cites it

6 citing papers in PubMed.

  1. Observational
  2. Article
  3. Article
  4. Article
  5. Review
  6. Influence of a multifocal intraocular lens centration and eye angles on light distortion and ocular scatter index.Graefe's archive for clinical and experimental ophthalmology = Albrecht von Graefes Archiv fur klinische und experimentelle Ophthalmologie · 2023
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5 · Who and what money

Authors and funding

7 authors.

Jie LuoDepartment of Ophthalmology, The First Affiliated Hospital of Harbin Medical University, 23 Bundesgasse, Harbin, Heilongjiang Province, China.
Yang LiuDepartment of Ophthalmology, The Daqing Oilfields General Hospital, 19 ZhongKang Roud, Daqing, Heilongjiang Province, China.
Feng Wang *Department of Ophthalmology, The First Affiliated Hospital of Harbin Medical University, 23 Bundesgasse, Harbin, Heilongjiang Province, China. doctorhrb0451@163.com.
Ying Su *Department of Ophthalmology, The First Affiliated Hospital of Harbin Medical University, 23 Bundesgasse, Harbin, Heilongjiang Province, China. wangfd@126.com.
Xuebing XiaoDepartment of Ophthalmology, The Daqing Oilfields General Hospital, 19 ZhongKang Roud, Daqing, Heilongjiang Province, China.
Haitao DuDepartment of Ophthalmology, The First Affiliated Hospital of Harbin Medical University, 23 Bundesgasse, Harbin, Heilongjiang Province, China.
Qiang GuoDepartment of Ophthalmology, The First Affiliated Hospital of Harbin Medical University, 23 Bundesgasse, Harbin, Heilongjiang Province, China.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

purposeTo evaluate the clinical effect of TECNIS Symfony intraocular lens (IOL) implantation and identify the effect of kappa angle on the depth of focus (DOF) after implantation.

methodsThis prospective clinical study included consecutive patients who underwent cataract surgery and TECNIS Symfony IOL implantation at the Daqing Oilfield General Hospital from January 2019 to September 2019. Patients were divided into three groups according to the preoperative kappa angle (r): A (0 < r ≤ 0.2), B (0.2 < r ≤ 0.4), and C (r > 0.4). Uncorrected visual acuity was performed preoperatively and at 7 days, 1 month, and 3 months postoperatively. Synthetical optometry, higher-order aberrations, and defocus examinations were performed at 3 months postoperatively. Single-factor analysis of variance and Spearman correlation coefficient were used for data analysis.

resultsThe uncorrected visual acuity values of the three groups were significantly improved postoperatively, compared with preoperative values (p < 0.001). Three months postoperatively, the best-corrected visual acuity values of the three groups were 0.11 ± 0.02 logarithm of the minimum angle of resolution (logMAR), 0.09 ± 0.03 logMAR, and 0.11 ± 0.03 logMAR, respectively. Spherical equivalent (SE) values were 0.37 ± 0.08 D, 0.41 ± 0.06 D, and 0.42 ± 0.06 D, respectively. Best-corrected visual acuity and SE did not significantly differ among the three groups (F = 1.254, p = 0.135; F = 0.849, p = 0.228). There was no significant difference in SE between the three groups (F = 1.658, p = 0.312). Moreover, higher-order aberrations did not significantly differ among the three groups (p > 0.05). The kappa angle was negatively correlated with the postoperative DOF (r = -4.341, p = 0.026). Three months postoperatively, 54.55% of patients exhibited DOF ≥ 3 D, while 92.42% of patients exhibited DOF ≥ 2 D. The ranges of DOF in the three groups were 3.18 ± 0.27 D, 2.83 ± 0.80 D, and 2.57 ± 0.89 D, respectively; the difference among the three groups was statistically significant (F = 5.689, p = 0.037).

conclusionMost patients achieved full-range vision after TECNIS Symfony IOL implantation, but the DOF narrowed for those with an excessively large kappa angle, which indicates a need for careful selection.

Indexed as

Lenses, IntraocularPhacoemulsificationHumansLens Implantation, IntraocularProspective StudiesProsthesis DesignRefraction, OcularDOFKappa anglePhacoemulsificationSymfony

Identifiers

PMID33751306

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.