Back to Search
Start Over
Validation of a Clinical Aberrometer Using Pyramidal Wavefront Sensing
- Source :
- Optometry and Vision Science. 96:733-744
- Publication Year :
- 2019
- Publisher :
- Ovid Technologies (Wolters Kluwer Health), 2019.
-
Abstract
- 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.
- Subjects :
- 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
Subjects
Details
- ISSN :
- 15389235 and 10405488
- Volume :
- 96
- Database :
- OpenAIRE
- Journal :
- Optometry and Vision Science
- Accession number :
- edsair.doi.dedup.....b299c5afd4eac891cf2cb21378e853ab
- Full Text :
- https://doi.org/10.1097/opx.0000000000001435