Characterization of visual phenomena with the Array multifocal intraocular lens

Hunkeler, John D.; Coffman, T. M.; Paugh, Jerry R.; Lang, Alan; Smith, Pamela J. Olúbùnmi; Tarantino, Nicholas

doi:10.1016/s0886-3350(02)01208-7

Cited by 46 publications

(34 citation statements)

References 10 publications

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“…Researchers have noted these factors, and some studies have analyzed the governing factors for patient satisfaction after implantation of multifocal IOLs. [7][8][9][10][11][12][13][14][15][16][17][18][19][20][21] Causes associated with photic phenomena noted in previous studies have included IOL decentration, retained lens fragment, posterior capsular opacification, dry-eye syndrome, uncorrected visual acuity (UCVA), use of spectacles for distance purposes, postoperative astigmatism, and postoperative spherical equivalent. 9,21 However, none of the studies in published literature have evaluated the role of misalignment between the visual axis and the pupillary axis, or the angle kappa, as a specific predictor for patient symptoms.…”

Section: Introductionmentioning

confidence: 99%

Predictive factor and kappa angle analysis for visual satisfactions in patients with multifocal IOL implantation

Prakash

Agarwal

et al. 2011

Eye

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Purpose To evaluate the visual acuity and quality-related satisfaction of patients implanted with a refractive design multifocal intraocular lens (IOL), and evaluate the factors predicting it including angle kappa. Setting Dr Agarwal's Eye Hospital and Eye Research Centre, Chennai. Methods In this prospective trial, 50 eyes of 44 consecutive patients were included. All patients underwent phacoemulsification with multifocal IOL implantation (Rezoom IOL, Abbott Medical Optics). The preoperative and postoperative assessment included slit lamp biomicroscopy, uncorrected visual acuity (UCVA), best-corrected visual acuity (BCVA) and kappa angle assessment. At 1 year, 37 patients (43 eyes), who finished follow-up, were asked to rate their symptoms on a graded questionnaire (0-5 for five queries). Results The decimal scores for UCVA and BCVA were 0.38 ± 0.21 and 0.47 ± 0.17 (preoperative), and 0.75 ± 0.22 and 0.99 ± 0.11 (postoperative), respectively. Symptom scores were haloes 0.98 ± 1.7, glare 0.69 ± 1.48, blurred distance 1.0 ± 1.7, intermediate 1.34 ± 1.6, near 1.06±1.8. On regression analysis haloes depended on angle kappa and distance UCVA (R 2 ¼ 0.26, P ¼ 0.029), and glare on angle kappa (R 2 ¼ 0.26, P ¼ 0.033). Poor satisfactions with distance, intermediate, and near vision were linked with distance UCVA (R 2 ¼ 0.17, P ¼ 2.3 Â 10 À4 ), distance UCVA (R 2 ¼ 0.1, P ¼ 0.04), and near UCVA (R 2 ¼ 0.12, P ¼ 0.03), respectively. The strongest predictor, however, for overall visual discomfort was distance UCVA (R 2 ¼ 0.1, P ¼ 0.04).Conclusions Our study suggests that there may be a role of misalignment between the visual and pupillary axis (angle kappa) in the occurrence of photic phenomenon after refractive multifocal IOL implantation.

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Section: Introductionmentioning

confidence: 99%

Predictive factor and kappa angle analysis for visual satisfactions in patients with multifocal IOL implantation

Prakash

Agarwal

et al. 2011

Eye

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“…Quanto ao cálculo da lente intra-ocular multifocal, obtivemos um equivalente esférico médio pós-operatório mais próximo de plano quando programávamos uma refração final de +0,50D. De acordo com alguns relatos na literatura mundial, deixar o paciente emétrope ou levemente hipermétrope minimiza a percepção de halos em comparação aos pacientes míopes (2,(10)(11) . No nosso estudo, 19 (32,7%) pacientes queixaram-se de halos no pós-operatório o que é uma porcentagem superior ao relatado no estudo de Häring et al (8) .…”

Section: Discussionunclassified

“…No nosso estudo, 19 (32,7%) pacientes queixaram-se de halos no pós-operatório o que é uma porcentagem superior ao relatado no estudo de Häring et al (8) . Esta queixa tem-se mostrado mais freqüente naqueles pacientes com lente multifocal do que com a monofocal (8,10) . É interessante ressaltar que dos 38 olhos dos 19 pacientes que se queixavam de halos, 26 (68,4%) apresentavam miopia na refração final com equivalente esférico médio de -0,89D.…”

Section: Discussionunclassified

Resultados do implante bilateral de lente intra-ocular multifocal SA-40N no Hospital de Olhos de Minas Gerais

Salera¹,

Souza²,

Guimarães³

et al. 2005

Arq. Bras. Oftalmol.

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“…6 Early methods to assess halos required patients to draw the outline of the perceived halo produced by a candle at a set distance. 8 Others involve visually 'bracketing' the edges of the halo with the examiners hands, 9 comparison of their halo with objects of known diameter, 10 or mechanical movement of a target towards or away from the light source in limited meridians. 11 Namiki and Tagami attached a glare source within an OCTOPUS 500E (Haag-Streit, Koeniz, Switzerland) automated perimeter to determine the extent of visual field loss surrounding a central glare source.…”

Section: Introductionmentioning

confidence: 99%

Tablet App halometer for the assessment of dysphotopsia

Buckhurst

Naroo

Davies

et al. 2015

Journal of Cataract and Refractive Surgery

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To assess the validity and repeatability of the Aston Halometer. Setting:University clinic, UK. Design:Prospective repeated-measures experimental study Methods:The Aston Halometer comprises of a bright Light-Emitting-Diode (LED) glare source in the centre of an iPad4. Letters, subtending 0.21° (~0.3logMAR), were moved centrifugally from the LED in 0.05º steps in 8 orientation separated by 45° for each of 4 contrast levels (1000, 500, 100 and 25 Weber contrast units [Cw]) in random order. Bangerter foils were inserted in front of the right eye to simulate monocular glare conditions in 20 subjects (mean age 27.7±3.1 years). Subjects were positioned 2m from the screen in a dark room with the iPad controlled from an iPhone via Bluetooth operated by the researcher. The Oculus C-Quant was also used with each of the foils to measure the level of straylight over the retina. Halometry and straylight repeatability was assessed at a second visit. Results:Halo size increased with the different Bangerter foils and target contrasts (F=29.564, p<0.001) as expected and in a similar pattern to straylight measures (F=80.655, p<0.001). Lower contrast letters showed better sensitivity, but larger glareobscured areas resulting in ceiling effects due to the screen's field-of-view, with 500Cwbeing the best compromise. Intra-observer and inter-observer repeatability of the AstonHalometer was good (500Cw: 0.84-0.93 and 0.53-0.73) and similar to the CQuant. Conclusions:The Aston Halometer provides a sensitive, repeatable way of quantifying a patient recognised form of disability glare in multiple orientations to add objectivity to subjectively reported discomfort glare.

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Characterization of visual phenomena with the Array multifocal intraocular lens

Abstract: Both study groups reported similar visual phenomena. The difference between those who were bothered by the visual sensations and those who were not appears to be a function of individual tolerance. The visual sensations may be mitigated with minus-lens overcorrection.

Cited by 46 publications

References 10 publications

Predictive factor and kappa angle analysis for visual satisfactions in patients with multifocal IOL implantation

Predictive factor and kappa angle analysis for visual satisfactions in patients with multifocal IOL implantation

Resultados do implante bilateral de lente intra-ocular multifocal SA-40N no Hospital de Olhos de Minas Gerais

Tablet App halometer for the assessment of dysphotopsia

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