Related Experiment Video
Updated: Jun 18, 2026
05:46
Correction of Presbyopia by Monocular Bi-Aspheric Ablation Profile
Published on: September 20, 2024
Multifocal intraocular lens optic anteriorization capture to correct residual refractive error
Leonardo Akaishi1, Tiago Bessa, Rodrigo Vaz
1Brasília Ophthalmologic Hospital, Brasília, DF, Brazil.
Journal of Cataract and Refractive Surgery
|December 9, 2009
Summary
Anterior optic capture effectively corrects residual refractive error in multifocal intraocular lens (IOL) eyes. This safe procedure improved distance vision and spectacle independence, with minimal complications.
Area of Science:
- Ophthalmology
- Refractive Surgery
- Intraocular Lenses
Background:
- Multifocal intraocular lenses (IOLs) are widely used for cataract surgery to correct refractive errors.
- Residual refractive error after IOL implantation can impact visual outcomes.
- Anterior optic capture is a surgical technique to reposition IOLs.
Purpose of the Study:
- To evaluate the efficacy and safety of capturing the intraocular lens (IOL) optic through the anterior capsulorhexis opening.
- To correct residual refractive error in eyes with multifocal IOLs.
Main Methods:
- Prospective analysis of eyes with previous cataract surgery and Tecnis ZM900 multifocal IOL implantation.
- Surgical intervention involved capturing the IOL optic through the anterior capsulorhexis opening.
- Preoperative and postoperative visual acuities (UDVA, UNVA, UIVA, CDVA) and spherical equivalent (SE) were assessed.
Main Results:
- Significant improvement in uncorrected distance visual acuity (UDVA) and spherical equivalent (SE) after anterior optic capture (P<.001).
- No loss of corrected distance visual acuity (CDVA); 92.85% of patients achieved spectacle independence.
- One eye (6.25%) developed postoperative glaucoma; intermediate visual acuity (UIVA) worsened significantly (P = .011).
Conclusions:
- Anterior optic capture is a safe and accurate procedure for correcting mild hyperopic residual refractive error in eyes with multifocal IOLs.
- The technique offers a viable solution for improving visual outcomes and spectacle independence post-IOL implantation.
- Further research may be warranted to address the impact on intermediate vision.
Related Concept Videos
01:16Focusing of Light in the Eye
Light rays enter the eye through the cornea, a transparent dome-shaped tissue that is the eye's outermost layer. The cornea bends or refracts, light rays traveling to the pupil. The shape of the cornea determines how much of the light is bent and whether the image will be focused correctly on the retina at the back of the eye. Once the light has passed through both refraction layers, it converges into a single focal point onto a small area. This is where photoreceptors start transforming...
01:28Angle Closure Glaucoma: Treatment
Angle-closure glaucoma, or closed-angle glaucoma, is an eye condition where the iris bulges out and blocks the iridocorneal angle, resulting in a buildup of aqueous humor and increased intraocular pressure. Immediate medical attention is necessary due to the sudden onset of symptoms. The treatment for angle-closure glaucoma includes short-term and long-term approaches. Short-term treatment involves using eye drops like pilocarpine to lower intraocular pressure by increasing aqueous humor...
01:27Open Angle Glaucoma: Treatment
In open-angle glaucoma, the iridocorneal angle remains open, but the trabecular meshwork becomes stiff, slowing down the outflow of aqueous humor. This causes a buildup of aqueous humor in the anterior chamber, leading to a sudden increase in intraocular pressure. The treatment for open-angle glaucoma focuses on reducing the elevated intraocular pressure by either decreasing the secretion of aqueous humor or increasing its outflow.
Drugs such as carbonic anhydrase inhibitors, α2- and...
Drugs such as carbonic anhydrase inhibitors, α2- and...
01:25Glaucoma: Overview
Glaucoma is an eye condition characterized by increased intraocular pressure that damages the retina and optic nerve, leading to irreversible blindness if left untreated. The human eye has various components, including the cornea, iris, pupil, lens, and optic nerve. Aqueous humor is secreted by the epithelium of the ciliary body in the posterior chamber and flows through the trabecular meshwork and canal of Schlemm, maintaining normal intraocular pressure. The trabecular meshwork and the canal...