Clinical applications of wavefront aberrometry - a review. Cerviño A, Hosking SL, Montes-Mico R, Bates K.Analysis of Four Aberrometers for Evaluating Lower and Higher Order Aberrations. Cade F, Cruzat A, Paschalis EI, Espírito Santo L, Pineda R.Visual Benefit of Correcting Higher Order Aberrations of the Eye. Williams D, Yoon GY, Porter J, Guirao A, Hofer H.Statistical virtual eye model based on wavefront aberration. Wang J-M, Liu C-L, Luo Y-N, Liu Y-G, Hu B-J.These results can prove the reliability of iTrace device findings compared with B & L Zywave II. The findings of the two devices in lower and higher order aberrations showed good correlation, except in Trefoil (3, 3) that showed a weak correlation.Ĭonclusion: In both iTrace and Zywave devices, agreement was observed in lower order and higher order aberrations in patients with keratoconus. Also, the agreement on lower order aberrations, including defocus (2, 0) (LoA = -2.5 to 3.07), astigmatism (2, 2) (LoA = -1.22 to 1.56), and oblique astigmatism (2, -2) (LoA = -1.11 to 0.92).
Results: The results obtained from Zywave and iTrace showed no significant differences when paired t-test was used (except of Trefoil (3, 3)) and the Bland-Altmann agreement range was (LoA = -0.51 to 0.53) in the sphere and (LoA = -1.29 to 1.19) in cylinder. The statistical analyses used included paired t-test, Pearson correlation coefficient, and the Bland-Altmann plot. The results were compared and analyzed with regards to the sphere, cylinder, as well as lower and higher order aberrations of the two devices considering for 0.5 mm pupils.
Materials and Methods: In the present cross-sectional, comparative, and observational study, optical aberrations of 51 eyes of 40 patients with keratoconus, aged between 19 to 27 years old, refering to Farabi Eye Hospital in Tehran, were measured using iTrace and Bausch & Lomb Zywave II at a single visit without pupil dilation. You can also have better information about the patient's optical system's alignment so that you can decide which IOL is best for the patient.Background and Aim: To determine agreement between the aberrometry parameters of iTrace and Zywave in patients with keratoconus. Additionally, general eye care specialists can use this information to select and recommend the best vision correction treatment.
Surgeons benefit from this information when planning surgical procedures such as refractive lensectomies, AK's, Accommodative and Multifocal IOL's and for post-op evaluations. This 5-in-1 system provides auto-refraction, corneal topography, ray tracing aberrometry, pupillometry and auto-keratometry, saving time, space and money.īy integrating wavefront aberrometry with corneal topography, the iTrace provides a unique analysis that subtracts corneal from total aberrations in order to isolate the internal aberrations of the eye. The iTrace sequentially projects 256 near-infrared laser beams into the eye to measure forward aberrations, processing data point-by-point. The iTrace measures quality of vision and visual function using a fundamental thin beam principle of optical ray tracing, a first in eye care diagnostics. It offers easy to interpret reports, is simple to integrate, networkable and saves time, space and money. Visual analysis is not based only on sphere, and cylinder – iTrace offers an objective perspective of the complete visual pathway, analyzing aberrations from low to high order. The iTrace™ combines, auto refraction, corneal topography, auto-keratometry, wavefront aberrometry and pupillometry in one system.
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