In vitro and schematic model eye assessment of glare or positive dysphotopsia-type photic phenomena: Comparison of a new material IOL to other monofocal IOLs
| Autor: | Kamal K. Das, Stephen Collins, Xin Hong, Liliana Werner |
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| Rok vydání: | 2018 |
| Předmět: |
Physics
Lenses Intraocular Optics and Photonics Light business.industry medicine.medical_treatment Glare (vision) Intraocular lens Prosthesis Design Sensory Systems Collimated light Cataract Positive dysphotopsia Salt lake Glare Ophthalmology Alcon Laboratories Optics medicine Prosthesis design Humans Scattering Radiation Surgery Schematic model business |
| Zdroj: | Journal of cataract and refractive surgery. 45(2) |
| ISSN: | 1873-4502 |
| Popis: | Purpose To compare the glare-type photic phenomena for a new intraocular lens (IOL) to other monofocal IOLs, and to investigate how IOL design features might affect these phenomena. Setting Alcon Laboratories, Inc., Fort Worth, Texas; John A Moran Eye Center, University of Utah, Salt Lake City, USA. Design Schematic model eye evaluation and in vitro study. Methods Five monofocal IOL models (Clareon CNA0T0, Tecnis ZCB00, enVista MX60, Eternity W-60, and Vivinex XY1) were used to evaluate glare or positive dysphotopsia-type phenomena. Optical simulations of incoming light were generated using nonsequential ray-tracing software based on a collimated light source for various off-axis angles of illumination. The simulation analyses were verified using a laboratory in vitro bench-top glare measurement system. Results The Clareon and Vivinex IOLs produced focused off-axis images with negligible peripheral glare characteristics. The Tecnis and enVista IOLs produced dispersed images with additional glare characteristics at 45 degrees of off-axis illumination and higher. The Eternity IOL showed the highest edge-reflected glare characteristic, likely because of its straight optic edge geometry. The laboratory bench images and glare intensity profiles were consistent with the simulation data. Conclusions In vitro and nonsequential ray-tracing evaluations showed that straight optic edges and peripheral nonimaging optic geometry might contribute to positive dysphotopsia. The IOL designs with optic edge curvature and full functional optics demonstrated the lowest level of glare-type photic phenomena. Only clinical studies can confirm whether the differences observed between the IOLs in vitro are clinically significant. |
| Databáze: | OpenAIRE |
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