Itrace nursing software#
Recent advances provide the clinician with an awareness of why the new contrast-sensitivity standards are based on linear sine-wave gratings and how image-processing software can be used to better understand the quality of functional vision of the patient. Both measurements are needed to more fully understand the quality of vision. Contrast sensitivity measures the total visual system quality in terms of contrast, whereas wavefront aberrometry measures the optical quality in terms of spatial distortion.
Contrast sensitivity measurement is compared with wavefront aberrometry. Digital-image-processing software uses contrast sensitivity data to process images to help understand the quality of what the patient sees. Increased sensitivity of linear sine-wave gratings over proposed bull's-eye radial gratings is discussed. promise rapid advances of understanding and quantifying visual quality and function by unifying clinical results reported using contrast sensitivity. New American National Standards Institute standards for contrast sensitivity based on linear sine-wave gratings are discussed that.
Itrace nursing update#
This review provides an update of recent advances in understanding the quality and functional significance of contrast sensitivity for the clinician regarding cataract, intraocular lenses and refractive surgery that goes beyond the measurement of visual acuity. Moreover, systemic analysis of each toric calculator in conjunction with postoperative data is required. To achieve the best refractive outcome after toric IOL implantation, understanding the differences in keratometric values between instruments and in calculated astigmatic power among toric calculator programs is necessary. With the higher calculated astigmatic power values, the values from the iTrace toric calculator using keratometric values obtained from iTrace ray tracing wavefront aberrometry or iTrace simulated keratometry showed fair to moderate agreement with those from the other calculator-keratometry pairs in both groups. With the higher astigmatism and keratometric values from the IOLMaster, in both groups, calculations from the AcrySof and TECNIS calculators resulted in higher calculated astigmatic powers than those from same calculators with autokeratometry-measured values, demonstrating good agreement.
The TECNIS calculator tended to suggest a higher astigmatic power of the toric IOL than the AcrySof calculator. Based on measured keratometric values, the astigmatic power of each toric IOL was calculated using three toric calculators.īland-Altman plots showed good agreement between six pairwise corneal astigmatism values in both groups. autokeratometry, an IOLMaster, and an iTrace, which incorporated corneal topography and ray-tracing aberrometry. To compare the astigmatic power of toric intraocular lenses (IOLs) obtained from the AcrySof, TECNIS, and iTrace toric calculator in patients with preoperative with-the-rule (WTR) or against-the-rule (ATR) corneal astigmatism.įifty eyes with cataract and corneal astigmatism greater than 0.75 diopters were enrolled in each group (WTR and ATR).
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