Corneal Astigmatism, Cataract
Conditions
Brief summary
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.
Detailed description
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.
Interventions
DEVICEsubjective refraction
Short-term postoperative (1-3 months) and long-term postoperative (3-5 years) subjective optometry results were measured by subjective refraction.
Sponsors
Wenzhou Medical University
Study design
Observational model
CASE_ONLY
Time perspective
PROSPECTIVE
Eligibility
Sex/Gender
ALL
Age
18 Years to 90 Years
Healthy volunteers
No
Inclusion criteria
* ≥18years old * Regular astigmatism * Corneal astigmatism ≥ 0.75D
Exclusion criteria
* Macular degeneration and retinal disease, history of glaucoma, corneal disease * Previous corneal or intraocular surgery, and history of ocular inflammation. * Pupils can not be dilated (\< 7mm)
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| changes of magnitude of corneal astigmatism from pre-surgery to 3-5 years after surgery | before surgery and 3-5 years after surgery | using Pentacam measure cornea astigmatism of the subjects |
| changes of axis of corneal astigmatism from pre-surgery to 3-5 years after surgery | before surgery and 3-5 years after surgery | using Pentacam measure cornea astigmatism of the subjects |
| changes of manifest refractive astigmatism from1 -3 months after surgery to 3-5 years after surgery | 1-3 months after surgery and 3-5 years after surgery | measured using subjective refraction by Professional optometrists |
Contacts
Primary ContactDandan Wang, MD
Backup ContactYune Zhao, MD
Outcome results
None listed