The iTrace ray-tracing wavefront aberrometer from Tracey Technologies has carved out a unique niche for itself in the eye care arena. Combining both topography and aberrometry, the device can quantify dysfunctional lens index (DLI), separate aberrations due to the cornea from those attributed to the cataract, and more.
This objective metric helps eye care professionals to gain a deeper understanding of their patients’ vision complaints such as blurriness, halos, starbursts and night myopia.
iFunction, the world’s most advanced visual function analyzer from Tracey Technologies, has been used for more than a decade to uncover vision mysteries and educate patients. Designed to support clinicians in classifying quality of vision, choosing the right lens implant for cataract procedures (standard, toric or multifocal) and more, it is an indispensable tool for eye care professionals enhancing patient education, comfort and satisfaction with their treatment plans.
Using patented ray tracing aberrometry to objectively simulate a patient’s vision, the iTrace device is unique in its ability to separate corneal and internal aberrations affecting visual performance. This allows doctors to use a metric called the Dysfunctional Lens Index (DLI) to measure and track changes in a patient’s vision, enabling them to make more informed refractive and cataract surgery recommendations.
Now iTrace has expanded its capabilities to help doctors understand the true nature of a patient’s visual quality issues, with the introduction of a new feature known as the Prime Dashboard. The dashboard displays a detailed visualization of the optical system, breaking down the patient’s vision into depictions of corneal, internal and combined vision quality with a host of essential information displayed on one screen.
In addition, the iTrace Prime dashboard displays wavefront Ks and optical alignment angles as well as printable pictures to aid in surgical planning. Also included is the Toric Check, a feature that quickly and accurately locates a patient’s toric axis without dilation. This allows surgeons to verify that the toric lens is aligned correctly on the iris, ensuring optimal outcomes from lens replacement surgery. With the Prime Dashboard, iTrace continues to be a valuable tool for supporting clinicians in their decision-making process and enabling them to deliver better vision outcomes for patients.
Toric IOLs are a safe and effective cataract surgical strategy for patients with astigmatism. The success of these lenses depends on proper patient selection, meticulous preoperative measurements and planning, robust intraoperative surgical steps and early recognition of IOL misalignment in postoperative follow-up.
The Toric Planner from Haag-Streit (part of its EyeSuite toric platform, which complements the LenStar biometer) provides an intuitive way for surgeons to plan astigmatism-correcting IOL surgery using high-resolution images of the eye and a corneal incision-optimization tool. The system also calculates the axis location of a toric lens, which can be overlaid on a printable picture for easy reference during surgery.
Other toric IOL alignment systems are available, including one from Eye Photo Systems that uses iris fingerprinting for better precision. It layers a protractor on a high-resolution image of the dilated pupil and marks the keratometric meridians, IOL goal line and axis of incision on that picture, which can be carried into the OR on a USB drive or printed for use as a reference. A newer, ray-tracing aberrometer-based system from Carl Zeiss Meditec (TrueGuide) offers real-time vector analysis for IOL incision optimization and toric IOL/LRI positioning, reducing residual astigmatism. It can also provide regression analysis of postop diagnostics to refine the surgeon’s nomogram.
These tools can be used in conjunction with a premium cataract capture strategy that includes preoperative corneal mapping and iScan measurements. Patients can also be shown the benefits of toric IOLs, and if they choose a toric lens, they can experience an accurate representation of their vision with a Toric Check feature that shows them how much their astigmatism has been corrected.