ArticleClinical ophthalmology (Auckland, N.Z.)2020
Topography-Guided Refractive Astigmatism Outcomes: Predictions Comparing Three Different Programming Methods.
Article in Clinical ophthalmology (Auckland, N.Z.), 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to trial NCT04495829 (Clinical and Refractive Outcomes After Contoura® Refractive Surgery Planned Using Phorcides Surgery Planning Software), which is not on this map. Cited by 15 papers.
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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.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Clinical and Refractive Outcomes After Contoura® Refractive Surgery Planned Using Phorcides Surgery Planning Software
Who cites it
15 citing papers in PubMed, 24 citations in OpenAlex.
- Topography-Guided LASIK: A Prospective Study Evaluating Patient-Reported Outcomes.Clinical ophthalmology (Auckland, N.Z.) · 2023Trial
- Femtosecond laser-assisted in situ keratomileusis with topography-guided or asphericity-adjusted derived data: a comparative contralateral eye study.BMC ophthalmology · 2022Trial
- Multi-Site Study of Patient Reported Vision Quality and Dry Eye Following LASIK.Clinical ophthalmology (Auckland, N.Z.) · 2026Article
- Application of Surgical Protocols for the Treatment of Highly Irregular Astigmatism with Topographic Guided Ablation in a Case of Post-LASIK Ectasia.International medical case reports journal · 2025Article
- Patient Reported Visual Outcomes, Dry Eye Symptoms, and Satisfaction Following Topography-Guided LASIK.Clinical ophthalmology (Auckland, N.Z.) · 2025Article
- Clinical outcomes after topography-guided FS-LASIK for myopia with nonastigmatic eyes.BMC ophthalmology · 2024Article
- Retrospective Study Comparing Topography-Guided and Wavefront-Optimized LASIK Procedures in a Single Center.Clinical ophthalmology (Auckland, N.Z.) · 2024Article
- Topography-guided excimer laser ablation in refractive surgery.Frontiers in ophthalmology · 2024Article
- One-year clinical efficacy evaluation of selective corneal wavefront aberration-guided FS-LASIK correction in patients with high myopia.International journal of ophthalmology · 2023Article
- Article
- Comparison of Low Degree/High Degree and Zernike Expansions for Evaluating Simulation Outcomes After Customized Aspheric Laser Corrections.Translational vision science & technology · 2021Article
- Wavefront sensing, novel lower degree/higher degree polynomial decomposition and its recent clinical applications: A review.Indian journal of ophthalmology · 2020Review
- Disagreement Between Theoretical and Actual Phorcides Outcomes: Is Phorcides Inferior to Treating on the Manifest Refraction? [Letter].Clinical ophthalmology (Auckland, N.Z.) · 2020Article
- Predictions of Residual Astigmatism from Surgical Planning for Topographic-Guided LASIK Based on Anterior Corneal Astigmatism (LYRA Protocol) vs the Phorcides Analytic Engine.Clinical ophthalmology (Auckland, N.Z.) · 2020Article
- Clinical Outcomes After Topography-Guided Refractive Surgery in Eyes with Myopia and Astigmatism - Comparing Results with New Planning Software to Those Obtained Using the Manifest Refraction.Clinical ophthalmology (Auckland, N.Z.) · 2020Article
Corrections and comments
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Authors and funding
10 authors at 7 institutions in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
purposeTo identify the laser programming strategy that will achieve optimal refractive outcomes of LASIK with a topography-guided laser for eyes with a disparity between cylinder measured by manifest refraction and cylinder measured by topography.
settingSix surgeons at 5 clinical sites in the USA.
designRetrospective data review.
methodsPreoperative, treatment, and postoperative data on 52 eyes that underwent topography-guided LASIK with the WaveLight EX500 Contoura
resultsThe poorest calculated theoretical outcomes were obtained with the manifest refraction (centroid: -0.43, 0.22; mean calculated error vector: 0.56 ± 0.42 D; p=ns). Better outcomes were obtained with the topographically measured refraction (centroid: 0.37, 0.02; mean calculated error vector: 0.47 ± 0.33 D; p=ns). The best outcomes were obtained with Phorcides (centroid: -0.15, 0.06; mean calculated error vector: 0.39 ± 0.28 D; p=ns). The mean error vector magnitude in the Phorcides Low group was significantly lower than for the Manifest and Topo Low groups (0.26 D vs 0.48 D and 0.33 D; p<0.01). The mean error magnitude in the Phorcides High group was nearly 0.25 D lower than for the Manifest High group (0.48 D vs 0.70 D; p<0.01), but was the same as for the Topo High group (0.48 D vs 0.48 D).
conclusionOur study suggests that using the topographically measured cylinder or the cylinder selected by Phorcides will produce more desirable refractive outcomes than entry of the preoperative refractive cylinder as the basis for correction of myopia and myopic astigmatism with the WaveLight Contoura Vision excimer laser.
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Registered trials
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.