[Current state of the "light-adjustable lens"].
The light-adjustable intraocular lens offers the possibility to correct postoperative residual refractive errors in a non-invasive way. After implantation and healing, a fine-tuning of the refractive power can be performed using ultraviolet light based on the individual requirements of each patient. Up to 2 diopters in sphere, as well as cylinder, can be adjusted in one step. This technology received CE market approval in 2007. This review article summarises published prospective studies on clinical evaluations of the effectiveness, safety and long-term refractive stability of this innovative technique. Moreover, a critical statement about limitations and perspectives will be given and future options will be discussed. For safety reasons, following application of the UV-light during refractive adjustments, examinations of endothelial cell count changes and measurements of corneal thickness have been monitored for 12 months following treatment. Further studies have been performed to evaluate the refractive stability over an 18-month period with a patient population that included average as well as biometrically short and long eyes. An analysis of postoperative refractive data led to optimised constants for preoperative IOL power calculation enabling the surgeon to further enhance visual outcomes with the IOL by using additional nomograms for customised correction of presbyopia, multifocality and increasing depth of focus with individual corrections of asphericity.
Augenheilkunde, Universitäts-Augenklinik, Bochum. fritz.hengerer@kk-bochum.de
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Hengerer
D019544:Equipment Failure Analysis; D006801:Humans; D007910:Lenses, Intraocular / Q000639:trends*; D013508:Ophthalmologic Surgical Procedures / Q000009:adverse effects*; D011474:Prosthesis Design / Q000639:trends; D012030:Refractive Errors / Q000209:etiology*; D054140:Refractive Surgical Procedures / Q000295:instrumentation*; D012031:Refractometry / Q000295:instrumentation*