Fluidvision accommodating iol power vision
Until currently, virtually all surgical techniques that have been proposed for its correction are based on the induction of pseudoaccommodation in the presbyopic eye, including multifocality.However, the real restoration of accommodation is more complex, and it has been tried by the use of different, so called, “accommodative” pseudophakic intraocular lenses (AIOL).The multifactorial basis for the development of presbyopia makes it difficult to be managed adequately.The aging population, especially in western countries, has created millions of candidates around the world for such interventions.Only published studies (in English – full text) about accommodative lenses implanted in human clinical trials and with evidence level Grade I or II were included for the purpose of this publication.The following were the accommodative intraocular lenses reported in the literature review (Table Eyeonics Crystalens (Eyeonics, Inc., Aliso Viejo, CA, USA) is manufactured from high-refractive-index silicone material containing an ultraviolet (UV) filter.The elasticity of the capsule is held in check by the normal tension in the zonule so that accommodation consists in the relaxation of the tension in the zonule by the contraction of the ciliary muscle.
Pseudoaccommodation comprises a group of techniques that can improve near vision on the basis of the use of the cornea or intraocular lenses (IOLs), resulting in an increased depth of field, multifocality or both .
However, it is unclear if these documented changes in the ciliary muscle and the lens sclerosis occur together or if one is a consequence of the other. Thus, the ideal AIOL would fully resolve the inconvenience of presbyopia and the side effects in relation with current surgical options as the positive visual symptoms or the deterioration of quality of vision after multifocal IOL implantation.
Obviously, this ideal AIOL would have a huge impact in refractive surgery and private practice, which explains the interest from the different companies in developing such lenses.
The aim of this report is to provide an update and a general overview for the anterior segment ophthalmologist regarding the current state of the art AIOLs that have already been the subject of human clinical trials with evidence available by peer reviewed scientific publications.
A Pub Med review was performed, analyzing all publications from 2005 to 2016 concerning the topic “accommodative pseudophakic intraocular lenses” (keywords: accommodation, intraocular pseudophakic lenses, accommodative intraocular lenses).