![]() The average cyclotorsion of the eye when the patient is changed from the upright position to the supine position is approximately 2°–4° but can be up to 15°. When the patient is changed from the standing or sitting position to the supine position, cyclotorsion of the eye can cause misalignment. Precise preoperative limbal marking is crucial for an accurate alignment of toric IOLs. Toric intraocular lens (IOL) implantation during cataract surgery was more widely used owing to its reliability and effectiveness. Several surgical techniques, such as limbal relaxing incisions, peripheral corneal relaxing incisions, and excimer laser surgery, are used to eliminate or decrease coexisting astigmatism in patients with cataract. Because persisting astigmatism can decrease the visual acuity and the vision quality of patients after cataract surgery, predictable correction of the preexisting corneal astigmatism is critical and popular. It has been estimated that 30% of patients with cataract have preexisting astigmatism of over 0.75 D 8% of the eyes have corneal astigmatism of over 2.00 D and 2.6% of the eyes have corneal astigmatism of over 3.00 D. It can eliminate the potential systematic errors resulting from varying head positions during the preoperative keratometry measurement and from manual marking. The TRP marking method using the iTrace aberrometer is simple and accurate for preoperative marking of toric IOLs. The mean toric IOL misalignment was lesser but without significance in the TRP marking group than in the SHM marking group after 3 postoperative months (2.66° ± 1.42° versus 3.29° ± 1.67° ). There was no statistically significant difference in BCVA, UDVA, preexisting corneal astigmatism, or residual astigmatism between the groups before or after surgery. Fifteen eyes of 15 patients were in the TRP marking group and 15 eyes of 15 patients in the SHM marking group. The follow-up duration was 3 months after cataract surgery. TRP marking involved marking three points randomly in the corneal limbus of the patients and accurately marking the horizontal meridian was not required. All patients were prospectively randomized into the TRP marking group or slit-lamp horizontal meridian (SHM) marking group. Thirty eyes of 30 patients undergoing cataract surgery with coexisting corneal astigmatism of over 1.0 D were included in this study. Prospective, randomized comparative trial. Department of Ophthalmology, Guangdong Eye Institute, Guangdong Academy of Medical Sciences, Guangdong Provincial People’s Hospital, Guangzhou, China. To evaluate the clinical outcome of the three-random-point (TRP) marking method for toric intraocular lens (IOL) alignment using the iTrace aberrometer (Tracey Technologies Corp., Houston, TX). After reviewing the iTrace, one can move on to the results of traditional tests, such as glare vision, biometry, and Snellen acuity.Purpose. With the iTrace, surgeons no longer need to rely only on their subjective lens grading from the slit-lamp exam. Patients can easily understand their cataract “grade,” as the DLI scale shows how much optical distortion is coming from the lens, which I believe impresses them more than a trying to describe their cataract while holding a plastic eye model, for example. ![]() The latest software has made interpreting data more intuitive and user-friendly, with touchscreen or tablet displays.įor refractive consultations, when I enter the exam room, the first test I look at is the DLI display for each eye I then quickly know the cataract grade (or if the lens is still mostly clear and performing well) and also the amount of corneal astigmatism from the axial topography map. The compact device quickly measures the entire optical pathway to produce a dysfunctional lens index (DLI), enabling it to objectively grade lens opacity and separate visual aberrations due to the cornea and those attributed to the lens. The iTrace (Tracey Technologies) is an attractive diagnostic technology that features both topography and aberrometry. Tackling Ocular Inflammation and Pain With Lotemax Gel Following Ocular Surgery Tri-Moxi and the Dropless Cataract Surgery Revolutionĭisposable Gonioscopy in the OR and Clinic Shifting Gears in Glaucoma with Suprachoroidal Shunts Reflections on Fellowship Year: Five Lessons LearnedĬorneal Biomechanics for Detecting Subclinical Keratoconus Outstanding Female Leader in Ophthalmology: Sonia Yoo, MDīuilding a Five-Star Reputation with Online Reviews Outstanding Female Leader in Ophthalmology
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