Measurement of accommodation after implantation of an accommodating posterior chamber intraocular lens

Langenbucher, Achim; Huber, Stefan M.; Nguyen, Nhung X.; Seitz, Berthold; Gusek-Schneider, Gabriele-Charlotte; Küchle, Michael

doi:10.1016/s0886-3350(02)01893-x

Cited by 112 publications

(103 citation statements)

References 21 publications

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“…So it depends on patient cooperation and understanding. Subjective methods were found to be more reliable for measuring apparent accommodation according to Langenbucher et al 16 Many previous researches confirmed that the amplitude of apparent accommodation is correlated with different factors including; depth of focus 17,18 , pupil diameter 4,19 , degree of corneal astigmatism 20 , corneal multifocality and aberrations 21,22 , and IOL axial forward movement. 23,24 Depth of focus is an intrinsic characteristic of all optical systems that was considered to be one of the most significant factors of apparent accommodation.…”

Section: Discussionmentioning

confidence: 99%

The Analysis of Refraction and Accommodation of Extreme Myopia with Cataract after Phacoemulsification and IOL Implantation

Al-Wesabi¹,

Yang²,

Li³

et al. 2016

IOSR

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Abstract:Background: To assess the refractive status of cataract patients with extreme myopia and to measure their accommodative capability after monofocal IOL implantation. Design: Prospective non-randomized study conducted at Tianjin Medical University Eye Centre.Participants: 18 patients with 34 extreme myopic eyes ≥27mm axial length), and 14 patients with 27 non-myopic eyes that had uneventful phacoemulsification and monofocal IOL implantation. Methods:The accommodation amplitude of the two groups was compared pre-and post-operatively using subjective minus-lenses-to-blur method. In the extreme myopic group, the postoperative target refraction was selected to be myopic, and they were evaluated for predicted postoperative spherical power consistency.

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Section: Discussionmentioning

confidence: 99%

The Analysis of Refraction and Accommodation of Extreme Myopia with Cataract after Phacoemulsification and IOL Implantation

Al-Wesabi¹,

Yang²,

Li³

et al. 2016

IOSR

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“…Accommodation can also be measured subjectively and objectively in pseudophakic eyes. [53][54][55] In pseudophakic eyes, indirect measurements using ultrasonic A-scan measurements 56 and PCI 53,57 before and after ciliary muscle contraction using pilocarpine or phenylephrine found changes in the ACD, suggesting shifting of the IOL. The rate of the shift is highly dependent on the measuring technique and, with these indirect measurements, it is rather the maximum accommodation potential that is being measured.…”

Section: Discussionmentioning

confidence: 99%

Accommodation in phakic and pseudophakic eyes measured with subjective and objective methods

Németh

Lipécz

Szalai

et al. 2013

Journal of Cataract and Refractive Surgery

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PURPOSE:To measure accommodation subjectively and objectively and assess anterior segment changes during accommodation in phakic eyes and pseudophakic eyes. METHODS: Subjective and objective accommodation measurements and pupillometry were performed in phakic and pseudophakic patients. Refraction and pupil diameter were recorded with different accommodation stimuli. Corneal higher-order aberrations (HOAs) and anterior chamber depths (ACDs) were detected with a rotating Scheimpflug camera. RESULTS:The mean age of the 44 patients in the phakic group was 36.34 years G 16.6 (SD) and of the 27 patients in the pseudophakic group, 69.3 G 9.98 years. The mean subjective accommodation was 4.49 G 3.48 diopters (D) in phakic eyes and showed significant correlation with age, spherical aberration, changes in pupil diameter, and ACD. The mean subjective accommodation was 0.50 G 0.28 D in pseudophakic eyes. In phakic eyes, the mean objective accommodation was 0.46 G 1.02 D, 1.06 G 1.33 D, and 2.2 G 1.9 D with 2.0 D, 3.0 D, and 5.0 D, respectively, of stimulus. In pseudophakic eyes, measurable objective accommodation was recorded. In phakic eyes, the correlations were significant between these values and age, changes in ACD, pupil size, and corneal spherical aberration. In pseudophakic eyes, the only correlation was with the spherical equivalent value.

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“…The ACD can be measured with different ophthalmological techniques, such as ultrasound biometry, high-resolution magnetic resonance imaging, ultrasound biomicroscopy, Scheimpflug imaging, anterior segment optical coherence tomography, and partial coherence interferometry. 31,33,34 We used objective measurements with a newly developed high accuracy interferometric device.…”

Section: Discussionmentioning

confidence: 99%

A comparison of accommodation amplitudes in pseudophakic eyes measured with three different methods

Németh

Tsorbatzoglou

Vámosi³

et al. 2006

Eye

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Measurement of accommodation after implantation of an accommodating posterior chamber intraocular lens

Cited by 112 publications

References 21 publications

The Analysis of Refraction and Accommodation of Extreme Myopia with Cataract after Phacoemulsification and IOL Implantation

The Analysis of Refraction and Accommodation of Extreme Myopia with Cataract after Phacoemulsification and IOL Implantation

Accommodation in phakic and pseudophakic eyes measured with subjective and objective methods

A comparison of accommodation amplitudes in pseudophakic eyes measured with three different methods

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