Surgical Volume for Intraocular Lens (IOL) Dislocation/Decentration and Associated Patient/Ocular Factors: A
Takahiro Usami1,2, Hideyuki Shimizu3, Tadasu Sugita4
1Ophthalmology, Hamamatsu University School of Medicine, Hamamatsu, JPN.
Cureus
|January 8, 2026
Summary
The number of cataract surgeries and intraocular lens (IOL) dislocation procedures increased significantly between 2008 and 2014. However, surgeries for aphakic eyes remained stable, highlighting a need for IOL fixation training.
Area of Science:
- Ophthalmology
- Surgical Outcomes
- Public Health
Background:
- Intraocular lens (IOL) dislocation and decentration are potential complications following cataract surgery.
- Aphakia, the absence of a lens, requires secondary IOL implantation.
- Temporal trends in these procedures and associated patient factors are crucial for surgical planning and training.
Purpose of the Study:
- To analyze temporal trends in surgeries for IOL dislocation/decentration and aphakia.
- To examine patient and ocular background factors associated with these procedures.
- To assess the surgical load across three Japanese institutions.
Main Methods:
- Retrospective review of cataract-related procedures from 2008-2014 at three hospitals.
- Quantification of annual surgeries for standard cataract extraction, IOL fixation in aphakia, and IOL dislocation/decentration.
- Assessment of comorbidities (diabetes, PEX, AD, uveitis, prior vitrectomy), age, and sex.
Main Results:
- Significant increase in routine cataract surgeries (6,307 to 8,469) and IOL dislocation procedures (p<0.01).
- No significant trend observed in surgeries for aphakic IOL fixation (p=0.73) or IOL decentration (p=0.94).
- Comorbidity prevalence, mean patient age, and sex ratio remained stable over time.
Conclusions:
- While routine cataract surgery and IOL dislocation repair volumes rose, aphakic IOL fixation demand was constant.
- An aging population in Japan suggests a growing need for surgeons skilled in IOL fixation techniques, including scleral fixation.
Related Concept Videos
01:28Angle Closure Glaucoma: Treatment
1.1K
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...
1.1K
01:25Glaucoma: Overview
1.2K
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...
1.2K
01:27Open Angle Glaucoma: Treatment
953
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...
953