- Itrace toric lens alignment how to#
- Itrace toric lens alignment manual#
- Itrace toric lens alignment trial#
Itrace toric lens alignment manual#
Preoperative astigmatism was determined by refraction, manual keratometry using Bausch and Lomb manual keratometer (Bausch and Lomb, U.S.A) and automated keratometry using IOL Master 700 (Carl Zeiss Meditec.). Preoperatively, UDVA and CDVA were determined by Snellen's chart and converted to logMAR. The surgeries were performed by five surgeons. Eyes with irregular corneal astigmatism, previous intraocular or corneal surgeries, intraoperative complications compromising Toric IOL position such as zonular damage, vitreous loss, capsulorrhexis tear, posterior capsular rupture or any condition which could interfere with the visual outcome or with the postoperative assessment of the outcome such as high myopia, glaucoma, retinal disease, postoperative miosis, prolonged postoperative iritis, etc., were excluded. Institutional ethics committee approval was obtained before commencing the study.Įyes of participants with cataract and regular corneal astigmatism, undergoing cataract extraction with toric monofocal IOL implantation were included in the study. The study was in accordance with the institutional ethics committee and the Helsinki Declaration of 1975.
Itrace toric lens alignment trial#
This study was a prospective randomized controlled trial conducted at a tertiary eye care superspeciality eye hospital in South India between September 2017 and January 2019. This study compares the outcome of Toric IOL implantation guided by manual or digital marking techniques. Digital marking methods are aimed at reducing intraoperative IOL misalignment using images captured in the sitting position which are used as overlay for IOL alignment intraoperatively.
Accuracy in manual marking methods is affected by head position, errors on marking and smearing of ink. Marking aims at improving the accuracy of incision location and IOL alignment. One degree error in IOL alignment results in 3.3% decrease in the correction of astigmatism. Toric IOLs offer patients with higher degrees of corneal astigmatism, spectacle independence after cataract surgery. Randomized trial comparing visual outcomes of toric intraocular lens implantation using manual and digital marker.
Itrace toric lens alignment how to#
How to cite this URL: Kodavoor SK, Divya J, Dandapani R, Ramamurthy C, Ramamurthy S, Sachdev G. How to cite this article: Kodavoor SK, Divya J, Dandapani R, Ramamurthy C, Ramamurthy S, Sachdev G. Keywords: Astigmatism, IOL misalignment, marking, toric IOL, VERION Conclusion: Accurate manual marking and digital marking are equally effective guides for toric IOL alignment, intraoperatively. 67.74% ( n = 21) and 93.55% ( n = 29) eyes achieved a residual astigmatism of ≤0.50 D and ≤1.00 D, respectively, in Group 1, whereas 83.33% ( n = 25) and 100% ( n = 30) eyes achieved a residual astigmatism of ≤0.50 D and ≤1.00 D, respectively, in Group 2 at 3 months postoperatively. The mean postoperative cylindrical error was 0.50 ± 0.39 D in Group 1 and 0.29 ± 0.34 D in Group 2 ( P = 0.03). Results: A total of 61 eyes of 50 participants, 31 in Group 1 and 30 in Group 2, were studied. Postoperatively, UDVA, CDVA, residual refractive cylinder and IOL misalignment were determined (iTrace system, Tracey technologies) at 1 week, 6 weeks, and 3 months. Eyes were marked by bubble marker and Mendez ring in group 1 and by VERION (Alcon, Fort Worth, Texas) digital overlay in Group 2. IOL power and axis of alignment were determined using Barrett toric calculator. Preoperative Uncorrected distance visual acuity (UDVA), Corrected distance visual acuity (CDVA), and corneal astigmatism were determined. The eyes were grouped into manual marking (Group 1) and digital marking (Group 2). Methods: Randomized controlled trial of participants with cataract and corneal astigmatism of 1.00 D-4.50 D.
Purpose: The aim of this study was to compare the visual outcome of participants undergoing toric intraocular lens (IOL) implantation after cataract extraction using manual marking versus digital marking for intraoperative guidance.
0 kommentar(er)
