Impact of intraocular lens haptic design and orientation on decentration and tilt
| Autor: | Alja Crnej, Vinod Gangwani, Yutaro Nishi, Nino Hirnschall, Juan Tabernero, Pablo Artal, Oliver Findl |
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| Rok vydání: | 2011 |
| Předmět: |
Optics and Photonics
medicine.medical_specialty genetic structures medicine.medical_treatment Pilot Projects Intraocular lens Diagnostic Techniques Ophthalmological Artificial Lens Implant Migration Prosthesis Design Lens Implantation Intraocular Ophthalmology Orientation (geometry) medicine Humans Prosthesis design Aged Aged 80 and over Lenses Intraocular Phacoemulsification business.industry Follow up studies Horizontal orientation Middle Aged Centration eye diseases Sensory Systems Prosthesis Failure Tilt (optics) Optometry Surgery sense organs business Follow-Up Studies |
| Zdroj: | Journal of Cataract and Refractive Surgery. 37:1768-1774 |
| ISSN: | 0886-3350 |
| Popis: | Purpose To assess the effect of intraocular lens (IOL) orientation (vertical versus horizontal) and haptic design (1-piece versus 3-piece) on centration and tilt using a Purkinje meter. Setting Moorfields Eye Hospital NHS Foundation Trust, London, United Kingdom. Design Randomized pilot study with intrapatient comparison. Methods In part 1 of this study, patients received plate-haptic IOLs (Akreos Adapt) in both eyes that were positioned vertically in 1 eye and horizontally in the other eye. In part 2, patients received a 1-piece IOL (Acrysof SA60AT) in 1 eye and a 3-piece IOL (Acrysof MA60AC) in the contralateral eye. Decentration and tilt were measured 1 month and 3 months postoperatively with a new Purkinje meter. Results In part 1 (n = 15), the mean decentration of plate-haptic IOLs was 0.4 mm ± 0.2 (SD) with vertical orientation and 0.4 ± 0.2 mm with horizontal orientation and the mean tilt, 1.5 ± 1.1 degrees and 2.9 ± 0.9 degrees, respectively. In part 2 (n = 15), the mean decentration was 0.4 ± 0.3 mm with 1-piece IOLs and 0.6 ± 0.8 mm with 3-piece IOLs and the mean tilt, 2.2 ± 7.2 degrees and 5.3 ± 2.4 degrees, respectively. Conclusions Three-piece IOLs had a greater tendency toward more decentration than 1-piece IOLs, perhaps because of slight deformation of 1 or both haptics during implantation or inaccuracies in production when the haptics are manually placed into the optic. The IOL orientation for plate-haptic IOLs appeared to have no effect on IOL position. The Purkinje meter was useful in assessing the capsule bag performance of the IOLs. Financial Disclosure No author has a financial or proprietary interest in any material or method mentioned. Additional disclosures are found in the footnotes. |
| Databáze: | OpenAIRE |
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