Validation of a Clinical Aberrometer Using Pyramidal Wavefront Sensing
| Autor: | Dawn Meyer, Martin E. Rickert, Arthur Bradley, Viswanathan Ramasubramanian, Olivia Reed, Neeraj Kumar Singh, Matt Jaskulski, Pete S Kollbaum |
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| Rok vydání: | 2019 |
| Předmět: |
Adult
Corneal Wavefront Aberration genetic structures Visual Acuity Coma (optics) Refraction Ocular Young Adult 03 medical and health sciences 0302 clinical medicine Optics Myopia Humans Physics Wavefront business.industry Aberrometry Paraxial approximation Accommodation Ocular Reproducibility of Results Presbyopia Repeatability Wavefront sensor Middle Aged Refractive Errors Refraction eye diseases Ophthalmology Spherical aberration Hyperopia 030221 ophthalmology & optometry sense organs business Focus (optics) 030217 neurology & neurosurgery Optometry |
| Zdroj: | Optometry and Vision Science. 96:733-744 |
| ISSN: | 1538-9235 1040-5488 |
| Popis: | Significance Measurement of ocular aberrations is a critical component of many optical corrections. Purpose This study examines the accuracy and repeatability of a newly available high-resolution pyramidal wavefront sensor-based aberrometer (Osiris by Costruzione Strumenti Oftalmici, Firenze, Italy). Methods An engineered model eye and a dilated presbyopic eye were used to assess accuracy and repeatability of aberration measurements after systematic introduction of lower- and higher-order aberrations with calibrated trial lenses (sphere +10.00 to -10.00 D, and astigmatic -4.00 and -2.00 D with axis 180, 90, and 45°) and phase plates (-0.57 to 0.60 μm of Seidel spherical aberration defined over a 6-mm pupil diameter). Osiris aberration measurements were compared with those acquired on a previously calibrated COAS-HD aberrometer for foveal and peripheral optics both with and without multizone dual-focus contact lenses. The impact of simulated axial and lateral misalignment was evaluated. Results Root-mean-square errors for paraxial sphere (corneal plane), cylinder, and axis were, respectively, 0.07, 0.11 D, and 1.8° for the engineered model and 0.15, 0.26 D, and 2.7° for the presbyopic eye. Repeatability estimates (i.e., standard deviation of 10 repeat measures) for the model and presbyopic eyes were 0.026 and 0.039 D for spherical error. Root-mean-square errors of 0.01 and 0.02 μm, respectively, were observed for primary spherical aberration and horizontal coma (model eye). Foveal and peripheral measures of higher- and lower-order aberrations measured with the Osiris closely matched parallel data collected with the COAS-HD aberrometer both with and without dual-focus zonal bifocal contact lenses. Operator errors of focus and alignment introduced changes of 0.018 and 0.02 D/mm in sphere estimates. Conclusions The newly available clinical pyramidal aberrometer provided accurate and repeatable measures of lower- and higher-order aberrations, even in the challenging but clinically important cases of peripheral retina and multifocal optics. |
| Databáze: | OpenAIRE |
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