Ghost-image analysis in phakic intraocular lenses with central hole as a potential cause of dysphotopsia

Eppig, Timo; Spira, C; Tsintarakis, Themistoklis; El-Husseiny, M; Cayless, Alan; Müller, Marc Brandt und Friedrich; Seitz, Berthold; Langenbucher, Achim

doi:10.1016/j.jcrs.2015.05.034

Cited by 41 publications

(20 citation statements)

References 33 publications

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“…Some patients complained of halos appearing in a dark environment. Haloes may arise from high contrast in a night time environment, and/or the central hole affecting diffraction causing the glare [12]. Our patients with glare complaints were given psychological counseling and with time the glare problems gradually disappeared without any treatment.…”

Section: Resultsmentioning

confidence: 99%

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Long Term Assessment of the Quality of Visual-related Daily Activities after ICL (V4C) Implantation for Myopia and Myopic Astigmatism

Linghu

Liu²,

Liao

et al. 2018

Preprint

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Background: The purpose of the study was to evaluate long-term quality of visual related daily activities after Central Hole Collamer Lens implantation to treat myopia and myopic astigmatism. Methods: This retrospective study included 46 eyes (23 patients) receiving an ICL-V4c implantation. The follow up time was at least 24 m. Uncorrected visual acuity (UCVA), best corrected visual acuity (BCVA), refraction, eye axis, intraocular pressure, endothelial cell density (ECD), vault, and the patients’ satisfaction related to vision related daily activities were recorded at 6 m and 24 m. Results: The mean spherical equivalents were -0.14 ± 0.21 D and -0.12 ± 0.33 D at 6 m and 24 m after surgery, respectively. UCVA of all eyes were equal to or better than preoperative BCVA. The BCVA at 6 m and 24 m after implantation were -0.03 ± 0.08 LogMAR, and −0.03 ± 0.11 LogMAR, respectively, which was statistically better (P = 0.031) than that of pre-operation value of 0.07 ± 0.12 LogMAR. There was no significant differences (P > 0.05) between the pre operation and post operation ECD.At 24 m post operation, 10% of the patients complained of difficulty driving at night, but most of patient had satisfactory or very satisfactory vision-related daily activity scores. Some patients, 13%, were worried about the long-term safety and efficacy of the V4c-ICL implantation. Conclusions: Patients were very satisfied with their vision related daily activities after V4c-ICL implantation. With time, some patients worried about the permanent safety and efficacy.

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Section: Resultsmentioning

confidence: 99%

“…Some patients complained about halo or glare in dark environments [12]which can cause nighttime driving difficulty, and some patients worried about the safety and the efficacy in the long-term of the implantation.…”

Section: Introductionmentioning

confidence: 99%

Long Term Assessment of the Quality of Visual-related Daily Activities after ICL (V4C) Implantation for Myopia and Myopic Astigmatism

Linghu

Liu²,

Liao

et al. 2018

Preprint

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“…Due to a lack of relevant previous literature, we can only speculate regarding this increased performance. One possibility is that there is an impact of ringshaped dysphotopsia, as reported by Eppig and co-workers [14] and Eom and co-workers [15] in 2015 and 2017, respectively, according to a special visual sequela induced by V4c implantation. Both studies suggested that dysphotopsia may be influenced by illumination intensity, and Eom and coworkers reported a subjective feeling in patients that dysphotopsia was more obvious under bright conditions, which may have resulted in less improvement [15].…”

Section: Discussionmentioning

confidence: 98%

Optical Quality after Posterior Chamber Phakic Implantation of an Intraocular Lens with a Central Hole (V4c Implantable Collamer Lens) under Different Lighting Conditions

He¹,

Zhou

2020

Preprint

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Background: The current study compared optical quality before and after implantation of a posterior chamber phakic intraocular lens with a central hole [V4c implantable collamer lens (ICL)] under bright and dark lighting conditions by means of the Optical Quality Analysis System™ (OQAS; Visiometrics, Terrassa, Spain). Methods: This prospective study involved 91 eyes of 46 consecutive high myopia patients (15 males and 31 females, average spherical equivalent -10.50±0.33D) undergoing implantation of a V4c ICL. The modulation transfer function (MTF) cutoff frequency, Strehl ratio, objective scattering index (OSI), and predicted visual acuities (PVAs; 100%, 20%, and 9%), under different lighting conditions, were measured before and 1 week, 1 month, and 3 months after surgery. Results: All optical parameters showed significant improvements, at all time points, under dark condition after surgery. We observed no significant changes in PVA 9% at 1 week (mean value 0.539, P=0.12) or 1 month after surgery (mean value 0.573, P=0.08) under bright condition; but all other postoperative parameters improved significantly. Comparing the two lighting conditions, the OSI decreased more under dark conditions at 1 week (P=0.02), 1 month (P=0.004), and 3 months (P=0.002), but there was no significant difference in any other parameter. In addition, patients were divided into super high myopia (group S, spherical equivalent greater than -10 D) and high myopia (group H, spherical equivalent from -6 D to -10 D), the group S improved significantly more than group H in all parameters, under both bright and dark conditions. Conclusions: V4c ICL implantation improved optical quality under both bright and dark lighting conditions, and had a better ability to reduce the extent of scattering in the dark. Furthermore, group S achieved greater improvement in visual quality, which should be considered by physicians before surgery.

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“…In particular, this occurs more evidently in situations where light rays pass obliquely through the central hole. Eppig et al (2015) showed that the central hole of hole ICL may be a source of positive dysphotopsia using a non-sequential ray-tracing method. In that study, positive dysphotopsia mainly originated from light reflection from the inner wall of the central hole.…”

Section: Discussionmentioning

confidence: 99%

Ring‐shaped dysphotopsia associated with posterior chamber phakic implantable collamer lenses with a central hole

Eom

Kim

Ryu

et al. 2016

Acta Ophthalmologica

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2 AbstractPurpose: To evaluate the incidence of central hole-induced ring-shaped dysphotopsia after posterior chamber phakic implantable collamer lens (ICL) with central hole (hole ICL) implantation and to investigate the causes of central hole-induced dysphotopsia. Methods:The clinical study enrolled 29 eyes of 15 consecutive myopic patients implanted with hole ICL. The incidence of ring-shaped dysphotopsia after hole ICL implantation was evaluated. In the experimental simulation study, non-sequential ray tracing was used to construct myopic human eye models with hole ICL and ICL without a central hole (conventional ICL). Simulated retinal images measured in log-scale irradiance were compared between the two ICLs for an extended Lambertian light-emitting disk object 20 cm in diameter placed 2 m from the corneal vertex. To investigate the causes of hole-induced dysphotopsia, a series of retinal images were simulated using point sources at infinity with well-defined field angles (0 to -20º) and multiple ICL models.Results: Of 29 eyes, 15 experienced ring-shaped dysphotopsia after hole ICL implantation. The simulation study using an extended Lambertian source showed that hole ICL-evoked ring-shaped dysphotopsia was formed at a retinal field angle of ± 40º. Component level analysis using a welldefined off-axis point source from infinity revealed that ring-shaped dysphotopsia was generated by stray light refraction from the inner wall of the hole and the posterior ICL surface. Conclusion:Hole ICL-evoked ring-shaped dysphotopsia was related to light refraction at the central hole structure. Surgeons are advised to explain to patients the possibility of ring-shaped dysphotopsia after hole ICL implantation.

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Ghost-image analysis in phakic intraocular lenses with central hole as a potential cause of dysphotopsia

Abstract: The authors have no financial interest in any of the material presented in this paper.

Cited by 41 publications

References 33 publications

Long Term Assessment of the Quality of Visual-related Daily Activities after ICL (V4C) Implantation for Myopia and Myopic Astigmatism

Long Term Assessment of the Quality of Visual-related Daily Activities after ICL (V4C) Implantation for Myopia and Myopic Astigmatism

Optical Quality after Posterior Chamber Phakic Implantation of an Intraocular Lens with a Central Hole (V4c Implantable Collamer Lens) under Different Lighting Conditions

Ring‐shaped dysphotopsia associated with posterior chamber phakic implantable collamer lenses with a central hole

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