ArticleEye and vision (London, England)2015
Centration axis in refractive surgery.
Article in Eye and vision (London, England), 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 37 papers, 1 of them a synthesis that pooled it.
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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.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
37 citing papers in PubMed, 1 synthesis or guideline pooled it.
- Clinical outcomes of corneal refractive surgery comparing centration on the corneal vertex with the pupil center: a meta-analysis.International ophthalmology · 2020Pooled it
- Comparison of asymmetric and symmetric offset ablation in myopic astigmatism patients.Scientific reports · 2025Trial
- Angle Kappa agreement between Scheimpflug tomography, combined placido Scheimpflug and combined slit scanning placido systems.International ophthalmology · 2023Trial
- Orthokeratology Decentration: Topography Alignment, Tear Profile Symmetry and Induced HOAs.Ophthalmic & physiological optics : the journal of the British College of Ophthalmic Opticians (Optometrists) · 2026Article
- Asymmetry between nasal and temporal refraction with accommodation in myopes and emmetropes.Biomedical optics express · 2026Article
- Association of intraocular lens tilt and decentration with visual acuity using SS-OCT-based analysis.Graefe's archive for clinical and experimental ophthalmology = Albrecht von Graefes Archiv fur klinische und experimentelle Ophthalmologie · 2025Article
- Fluctuations in angle lambda with the pupil diameter and correlations with biometric values in a healthy population.Ophthalmic & physiological optics : the journal of the British College of Ophthalmic Opticians (Optometrists) · 2025Article
- Comparison of clinical outcomes following small incision lenticule extraction performed with the visumax 800 versus visumax 500 femtosecond laser.Scientific reports · 2025Article
- IMI-Instrumentation for Myopia Management.Investigative ophthalmology & visual science · 2025Review
- Impact of Pupil-Decentration on Visual and Refractive Outcomes in Myopic Patients Undergoing High Astigmatic PRK Surgery.Journal of clinical medicine · 2025Article
- Replacing Theories with Evidence Around the Axes of the Eye in Intraocular Lens Selection: A Review for the Clinician.Ophthalmology and therapy · 2025Review
- Comparison of visual outcomes and optical aberrations after SMILE with intraoperative Kappa angle adjustments between small and large Kappa angles.Scientific reports · 2024Article
- Comparison of Scheimpflug tomography, Placido disc, and combined Placido Scheimpflug in the measurement of pupil offset in myopic population.Frontiers in medicine · 2024Article
- Method to determine the centration of a lenticule of tissue extracted from a cornea.Biomedical optics express · 2023Article
- Symmetric offset versus asymmetric offset ablation with transepithelial refractive keratectomy.BMC ophthalmology · 2023Article
- Measurement of the visual axis through two different methods: quantification and differences for measuring chord μ.Arquivos brasileiros de oftalmologia · 2023Article
- 3D Gaze Estimation Using RGB-IR Cameras.Sensors (Basel, Switzerland) · 2022Article
- Visual Axis and Stiles-Crawford Effect Peak Show a Positional Correlation in Normal Eyes: A Cohort Study.Investigative ophthalmology & visual science · 2022Article
- Characteristics of Pupil Offset in Young Asian Adults With Mild-Moderate and High Myopia.Translational vision science & technology · 2022Article
- Rethinking Model-Based Gaze Estimation.Proceedings of the ACM on computer graphics and interactive techniques · 2022Article
Corrections and comments
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Authors and funding
3 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
The human eye is an asymmetric optical system and the real cornea is not a rotationally symmetrical volume. Each optical element in the eye has its own optical and neural axes. Defining the optimum center for laser ablation is difficult with many available approaches. We explain the various centration approaches (based on these reference axes) in refractive surgery and review their clinical outcomes. The line-of-sight (LOS) (the line joining the entrance pupil center with the fixation point) is often the recommended reference axis for representing wavefront aberrations of the whole eye (derived from the definition of chief ray in geometrical optics); however pupil centration can be unstable and change with the pupil size. The corneal vertex (CV) represents a stable preferable morphologic reference which is the best approximate for alignment to the visual axis. However, the corneal light reflex can be considered as non-constant, but dependent on the direction of gaze of the eye with respect to the light source. A compromise between the pupil and CV centered ablations is seen in the form of an asymmetric offset where the manifest refraction is referenced to the CV while the higher order aberrations are referenced to the pupil center. There is a need for a flexible choice of centration in excimer laser systems to design customized and non-customized treatments optimally.
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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.