High-frequency ultrasound biomicroscopy of silicone posterior chamber phakic intraocular lens for hyperopia

García‐Feijoó, Julián; Hernández-Matamoros, José L; Castillo‐Gómez, Alfredo; Lázaro, Carlos; Méndez-Hernández, Carmen; Martin, Teresa; Martinez-de-la-Casa, José M.; García–Sánchez, J.

doi:10.1016/s0886-3350(03)00240-2

Cited by 32 publications

(19 citation statements)

References 30 publications

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“…Different applications have been described for this ophthalmic technology; these include intraocular tumors analysis, 6,7 determination of the position of a pIOL, 14,15 planning for refractive surgery retreatment, 16 microkeratome cut analysis in LASIK, 17 study of intraocular pathology, [5][6][7]18 and analysis of some posterior segment structures. 19 As resolution normally improves with frequency, VHF waves are used for most anterior segment imaging, providing an axial resolution of less than 40 mm.…”

Section: Discussionmentioning

confidence: 99%

Anterior segment biometry with 2 imaging technologies: Very-high-frequency ultrasound scanning versus optical coherence tomography

Piñero

Plaza

Alió

2008

Journal of Cataract and Refractive Surgery

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Section: Discussionmentioning

confidence: 99%

Anterior segment biometry with 2 imaging technologies: Very-high-frequency ultrasound scanning versus optical coherence tomography

Piñero

Plaza

Alió

2008

Journal of Cataract and Refractive Surgery

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“…In a study of 20 cadaver eyes using ultrasound biomicroscopy, Werner et al demonstrated that the sulcus' vertical diameter was larger than the horizontal diameter in the same way that the anterior chamber's vertical internal diameter is larger than the horizontal diameter (L. In ultrasound studies, Garcia-Feijoó et al 22,23 demonstrate that posterior chamber IOLs were rarely in the sulcus and often rested against the zonules, crystalline lens, or the ciliary body. Moreover, at each extremity, the position of the IOL's footplates were not necessarily symmetrical.…”

Section: Role Of the Anterior Chamber Oct In Evaluating Posterior Chamentioning

confidence: 99%

Anterior segment OCT and phakic intraocular lenses: A perspective

Baikoff¹

2006

Journal of Cataract and Refractive Surgery

118

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Perfect tolerance is expected when one implants a phakic intraocular lens (pIOL) in the anterior segment. Not only should the material be compatible, but the pIOL must respect the anatomy of the anterior chamber. Based on 3 years of experience using an anterior segment optical coherence tomographer (Visante OCT, Carl Zeiss Meditec), I have defined numerous safety criteria for pIOLs. The internal dimensions of the anterior chamber must be considered along different meridians. I propose an objective measurement of the iris dome, the crystalline lens rise (CLR), which is the distance between the anterior pole of the crystalline lens and a line joining the 2 opposite iridocorneal angles. In a series with the Artisan IOL (Ophtec), pigment dispersion syndrome appeared in 70% of cases in which the CLR was greater than 600 microm. Angle-supported IOLs must be placed relative to the anterior chamber's largest diameter; in the same series of cases, the anterior chamber was oval with a large vertical axis in 74% of cases. The posterior face of an angle-supported IOL must have a 700 microm vault to respect the physiological modifications of the crystalline lens. It is difficult to know the posterior chamber's exact diameter as it varies with the horizontal or vertical axis. It also undergoes constant modifications due to accommodation and aging.

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“…However, it has been found that both PRL positions may coexist for the same implant in the same eye. 40,41 Stabilization of the PRL over the zonule promotes lens rotation whereas its position in the ciliary sulcus leads to an increase in the anterior convexity of the pIOL, thus reducing anterior chamber depth and narrowing the iridocorneal angle.…”

Section: Dynamics and Intraocular Interaction Of The Prlmentioning

confidence: 99%

The posterior chamber phakic refractive lens (PRL): a review

Pérez-Cambrodí

Piñero

Ferrer-Blasco

et al. 2012

Eye

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Implantation of phakic intraocular lenses (pIOLs) is a reversible refractive procedure, preserving the patient's accommodative function with minimal induction of higher order aberrations compared with corneal photoablative procedures. Despite this, as an intraocular procedure, it has potential risks such as cataracts, chronic uveitis, pupil ovalization, corneal endothelial cell loss, pigmentary dispersion syndrome, pupillary block glaucoma, astigmatism, or endophthalmitis. Currently, only two models of posterior chamber pIOLs are commercially available, the implantable collammer lens (STAAR Surgical Co.) and the phakic refractive lens (PRL; Zeiss Meditec). The number of published reports on the latter is very low, and some concerns still remain about its long-term safety. The present article reviews the published literature on the outcomes after PRL implantation in order to provide a general overview and evaluate its real potential as a surgical refractive option.

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High-frequency ultrasound biomicroscopy of silicone posterior chamber phakic intraocular lens for hyperopia

Abstract: In this study of hyperopic eyes, the PRL was located on the zonule in most cases. However, the location of the haptics in the sulcus and contact between the PCP IOL and the crystalline lens that occurred in some cases suggest further study of possible long-term complications is needed.

Cited by 32 publications

References 30 publications

Anterior segment biometry with 2 imaging technologies: Very-high-frequency ultrasound scanning versus optical coherence tomography

Anterior segment biometry with 2 imaging technologies: Very-high-frequency ultrasound scanning versus optical coherence tomography

Anterior segment OCT and phakic intraocular lenses: A perspective

The posterior chamber phakic refractive lens (PRL): a review

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