The role of the vitreous body in effective IOL positioning

Mijnsbrugge, Joris Vander; Fils, Jean‐François; Jansen, Joyce; Hua, Minh-Tri; Stalmans, Peter

doi:10.1007/s00417-018-3994-9

Cited by 16 publications

(14 citation statements)

References 12 publications

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“…Overall, our results are compatible with those of previously reported studies, with a slight myopic error of approximately −0.5 D. 4 , 7 , 8 A recent meta-analysis comparing combined phacovitrectomy and sequential surgery concluded that there were no significant differences in visual and refractive outcomes between the two. 13 However, some studies have reported that combined phacovitrectomy is associated with lower refractive accuracy.…”

Section: Discussionsupporting

confidence: 92%

“…The addition of vitrectomy was associated with an induced myopia of approximately −0.4 to −0.5 diopter. 4 , 7 , 8 The addition of gas at the end of surgery did not cause a significant change, and the PE was lower in patients that underwent vitrectomy for macular holes (MH). 8 PE was also associated with shallower anterior chamber depth (ACD) at presentation, increased central macular thickness (>300μ), and worse baseline best-corrected visual acuity.…”

Section: Introductionmentioning

confidence: 99%

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The Role of Anterior Chamber Depth on Post-operative Refractive Error After Phacovitrectomy

Katz¹,

Zhalka²,

Veksler³

et al. 2021

OPTH

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To investigate the effect of phacovitrectomy on the post-operative anterior chamber depth (ACD) and refractive outcomes, and to analyze the potential differences between vitreous filling with BSS, air and gas. Methods: Patients who underwent phacovitrectomy were included in this study and invited for repeated post-operative examination including refraction and biometry at least 3 months after the surgery. Data retrieved included demographic information, indication for phacovitrectomy, surgical details, type of vitreous filling (BSS, air or gas), pre-operative and postoperative biometric data including K-readings, axial length (AL), and ACD, as well as spherical equivalent (SE) values of the target and final refraction. Results: Forty-three eyes of 43 patients were included in this study, including 10 eyes filled with BSS, 18 with air and 15 with gas. The mean difference between the final measured spherical equivalent (SE) and the SE of the intended target refraction was 0.61±0.68 D (p = 0.019). Only 58.1% of eyes had a final SE within ±0.5D of the target refraction. Following surgery, AL remained unchanged, while mean pre-operative ACD increased significantly from 3.11±0.34 mm to 4.77±0.47 mm (p < 0.001). There was no difference in refractive error between the vitreous fillings and no correlation with AL or ACD. Conclusions: Phacovitrectomy is associated with lower accuracy of post-operative refraction compared to cataract surgery. This may be attributed to a significant change in ACD, influencing the effective lens position of the IOL, and may require adjustment of the preoperative calculations.

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Section: Discussionsupporting

confidence: 92%

Section: Introductionmentioning

confidence: 99%

The Role of Anterior Chamber Depth on Post-operative Refractive Error After Phacovitrectomy

Katz¹,

Zhalka²,

Veksler³

et al. 2021

OPTH

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“… Regarding the post-operative axial length (AL) we do not agree that an increased AL is necessarily expected. Vander Mijnsbrugge et al 2 measured postoperative AL and also did not find a significant difference. We agree that the non-significant difference between groups could be explained by limited number of examined patients, and have noted this point as a limitation of our study.…”

Section: Dear Editormentioning

confidence: 94%

“… 1 The slightly lower accuracy of the predicted refraction after combined phaco-vitrectomy with a small myopic shift was also shown in previous studies. 2 , 3 The scope of this study was to look at the ACD after surgery as a post-surgery measurement of the effective lens position (ELP). We wanted to find whether it correlates with the post-surgical error in the targeted refraction or the use of gas during the surgery.…”

Section: Dear Editormentioning

confidence: 99%

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“Anterior Chamber Depth After Phacovitrectomy” – Response to Letter to the Editor [Response to Letter]

Katz¹,

Zhalka²,

Veksler³

et al. 2021

OPTH

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IOL Calculation in Vitreoretinal Pathology and Surgery

Aramberri

2024

Essentials in Ophthalmology

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Intraocular lens (IOL) power calculation is frequently performed in the context of retinal pathology and concomitant vitreoretinal surgery. The precision of the regular biometric measurements and calculation formulas can be affected unless the surgeon avoids the different sources of error. In this chapter, the biometry of the eye with retinal pathology is described exposing the most relevant causes of an incorrect measurement and the ways to avoid or correct them. Previously, vitrectomized eyes, especially filled with silicone oil, were more prone to error, and both the measurements and the refractive target have to adapt to the particularity of the eye. Phacovitrectomy has become a routine surgery with increasing demands in refractive outcomes which forces the surgeon to perform a precise calculation with the latest formulas.

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The role of the vitreous body in effective IOL positioning

Abstract: An adjusted ELP parameter to optimize IOL calculation may be useful in eyes undergoing combined phacovitrectomy sugergy.

Cited by 16 publications

References 12 publications

The Role of Anterior Chamber Depth on Post-operative Refractive Error After Phacovitrectomy

The Role of Anterior Chamber Depth on Post-operative Refractive Error After Phacovitrectomy

“Anterior Chamber Depth After Phacovitrectomy” – Response to Letter to the Editor [Response to Letter]

IOL Calculation in Vitreoretinal Pathology and Surgery

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