In-the-Bag Stability of a New Hydrophilic Acrylic Toric Intraocular Lens.
Nikolaus Mahnert, Marcus Lisy, Markus Schranz et al.
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In 30 seconds
This single-centre, prospective interventional clinical trial assessed in-the-bag stability of the RayOne EMV toric intraocular lens in 119 eyes of 79 patients with age-related cataract over 6 months. Mean tilt and decentration at 6 months were 5.33° ± 1.81° and 0.22 ± 0.11 mm, respectively. Mean posterior axial shift from 1 week to 6 months was 0.13 ± 0.14 mm and correlated with anterior fibrosis severity (P < .001). Although average positioning measures were low, some lenses developed pronounced tilt and posterior axial shift.
Key findings
- At 6 months, mean absolute tilt was 5.33° ± 1.81° and mean decentration was 0.22 ± 0.11 mm.
- Mean tilt and decentration changes from preoperative measurements to 6 months were 1.59 ± 1.66° and 0.17 ± 0.09 mm.
- Seven toric lenses had a tilt change greater than 5° within 6 months.
- Posterior axial shift from 1 week to 6 months averaged 0.13 ± 0.14 mm and correlated with anterior fibrosis severity (P < .001).
Why it matters
Lens position and axial stability can affect refractive outcomes after cataract surgery. These findings indicate that low average tilt and decentration do not exclude substantial changes in individual eyes, and that anterior fibrosis was associated with posterior axial shift. The study highlights the value of considering individual postoperative stability rather than relying only on group mean measurements.
What to keep in mind
The study was conducted at a single centre and followed patients for 6 months.