Toric intraocular lens in asymmetric astigmatism
Sergio Kwitko1, Samara Barbara Marafon2, Andressa Prestes Stolz1
1Ophthalmology Department, Oftalmocentro, Av. Nilo Peçanha, 724/401, Porto Alegre, RS, Brazil.
International Ophthalmology
|January 27, 2020
Summary
Toric intraocular lens (IOL) implantation effectively reduces refractive cylinder in patients with asymmetric astigmatism, improving visual acuity and reducing spectacle dependence. This offers a safe and beneficial option for those intolerant to contact lenses.
Area of Science:
- Ophthalmology
- Refractive Surgery
- Corneal Surgery
Background:
- Asymmetric astigmatism presents challenges for visual correction.
- Patients intolerant to contact lenses or with unsatisfactory spectacle correction require alternative solutions.
- Toric intraocular lenses (IOLs) are designed to correct astigmatism during cataract surgery.
Purpose of the Study:
- To evaluate the efficacy and safety of toric IOL implantation in patients with asymmetric astigmatism.
- To assess the reduction in refractive cylinder and improvement in visual acuity.
- To determine the suitability of toric IOLs for individuals with specific corneal conditions and contact lens intolerance.
Main Methods:
- Retrospective cohort study of 88 eyes from 69 patients with various causes of asymmetric astigmatism.
- Patients underwent cataract surgery with toric IOL implantation, with lens selection based on optical biometry.
- Surgeries were performed by a single surgeon using a standardized technique.
Main Results:
- Best-corrected spectacle visual acuity improved significantly from 0.39 preoperatively to 0.80 postoperatively.
- Average refractive cylinder decreased from 2.32 D to 0.87 D (P < .001).
- 71% of eyes achieved a residual refractive cylinder of 1.0 D or less.
Conclusions:
- Toric IOL implantation is effective in managing asymmetric astigmatism.
- The procedure leads to improved visual acuity and reduced spectacle dependence.
- Toric IOLs offer a valuable solution for contact lens-intolerant patients seeking better vision quality.
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