An observational study in Corneal Astigmatism and Cataract, sponsored by Wenzhou Medical University. Status unknown. Open to participants aged 18 Years to 90 Years. Per ClinicalTrials.gov, last updated 2022-07-19.
Sponsored by Wenzhou Medical University · Observational
Corneal astigmatism is refractive error that impairs uncorrected visual acuity. When patients undergo cataract surgery, implantation of toric IOL is deemed the most effective choice for correcting corneal astigmatism and reducing postoperative spectacle dependence. Previous studies report that the visual effects and rotational stability of toric IOLs are well maintained over 1- or 2-year follow-up periods. However, the long-term changes in the effects of toric IOLs remain unclear.
Corneal astigmatism is refractive error that impairs uncorrected visual acuity. When patients undergo cataract surgery, implantation of toric IOL is deemed the most effective choice for correcting corneal astigmatism and reducing postoperative spectacle dependence. Previous studies report that the visual effects and rotational stability of toric IOLs are well maintained over 1- or 2-year follow-up periods. However, there is a long-term against-the-rule (ATR) change of corneal astigmatism with aging，which influences the long-term outcomes of refractive surgery. The long-term changes in the effects of toric IOLs remain unclear. This study aim to observe the clinical effect of Toric IOL implantation in the correction of corneal astigmatism.
1,701 studies on the registry are indexed under Cataract; 230 are open to participants now.
This study's planned enrollment of 60 is below the median of 81 across 484 observational studies indexed under Cataract.
Browse Cataract studies →Wenzhou Medical University is the lead sponsor of 93 studies on the registry; 8 are open to participants now.
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From December 2012 to present, cataract patients underwent phacoemulsification combined with Toric IOL(SN6ATX) implantation by an experienced ophthalmologist (Dr. Zhao Yune) in Wenzhou Medical University Affiliated Eye Hospital(hangzhou branch).
Exclusion Criteria:
This study included the patients who underwent cataract surgery with the toric IOL(SN6ATX) implantation. Preoperative and postoperative corneal astigmatism, short-term and long-term postoperative total astigmatism were the main outcome indicators. Preoperative corneal astigmatism (Pentacam and IOLMaster) would be obtained from outpatient and inpatient medical records, and the IOL axis should be calculated before surgery. Short-term postoperative (1-3 months) subjective optometry results; Long-term postoperative (3-5 years) corneal astigmatism (Pentacam and IOLMaster), subjective optometry results, and axial lens would be observed using SSOCT after pupil dilation.
Device: subjective refraction
Short-term postoperative (1-3 months) and long-term postoperative (3-5 years) subjective optometry results were measured by subjective refraction.
changes of magnitude of corneal astigmatism from pre-surgery to 3-5 years after surgery
using Pentacam measure cornea astigmatism of the subjects
Time frame: before surgery and 3-5 years after surgery
changes of axis of corneal astigmatism from pre-surgery to 3-5 years after surgery
using Pentacam measure cornea astigmatism of the subjects
Time frame: before surgery and 3-5 years after surgery
changes of manifest refractive astigmatism from1 -3 months after surgery to 3-5 years after surgery
measured using subjective refraction by Professional optometrists
Time frame: 1-3 months after surgery and 3-5 years after surgery
No study locations are listed for this record.
This study is status unknown, as verified in Jul 2022. You cannot join it, but the record below documents what was studied.
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Wenzhou Medical University