Straylight due to intraocular lens opacification in a patient with asteroid hyalosis

Vlasman, Johanna M.; Berg, Thomas; Reus, Nicolaas J.

doi:10.1016/j.ajoc.2020.100857

Cited by 4 publications

(2 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The ITSD algorithm detected higher glare angles in the pathological samples, which is consistent with the findings reported in the literature [ 40 , 41 ]. Results showed that the higher the amount of detected IS , the higher the computational costs for a successful restoration is ( Table 2 ).…”

Section: Discussionsupporting

confidence: 91%

See 1 more Smart Citation

Iterative-Trained Semi-Blind Deconvolution Algorithm to Compensate Straylight in Retinal Images

et al. 2021

View full text Add to dashboard Cite

The optical quality of an image depends on both the optical properties of the imaging system and the physical properties of the medium in which the light travels from the object to the final imaging sensor. The analysis of the point spread function of the optical system is an objective way to quantify the image degradation. In retinal imaging, the presence of corneal or cristalline lens opacifications spread the light at wide angular distributions. If the mathematical operator that degrades the image is known, the image can be restored through deconvolution methods. In the particular case of retinal imaging, this operator may be unknown (or partially) due to the presence of cataracts, corneal edema, or vitreous opacification. In those cases, blind deconvolution theory provides useful results to restore important spatial information of the image. In this work, a new semi-blind deconvolution method has been developed by training an iterative process with the Glare Spread Function kernel based on the Richardson-Lucy deconvolution algorithm to compensate a veiling glare effect in retinal images due to intraocular straylight. The method was first tested with simulated retinal images generated from a straylight eye model and applied to a real retinal image dataset composed of healthy subjects and patients with glaucoma and diabetic retinopathy. Results showed the capacity of the algorithm to detect and compensate the veiling glare degradation and improving the image sharpness up to 1000% in the case of healthy subjects and up to 700% in the pathological retinal images. This image quality improvement allows performing image segmentation processing with restored hidden spatial information after deconvolution.

show abstract

Section: Discussionsupporting

confidence: 91%

“…Considering the intraocular scattering as an important degradation factor, it is clear the increased IS in the presence of cataracts, lens opacifications, or even after cataract surgery [ 40 , 41 ]. However, retinal manifestations of systemic diseases such as diabetes mellitus can increase IS in a less clear way [ 42 , 43 ].…”

Section: Discussionmentioning

confidence: 99%

Iterative-Trained Semi-Blind Deconvolution Algorithm to Compensate Straylight in Retinal Images

et al. 2021

View full text Add to dashboard Cite

show abstract

Material Analysis of Explanted Calcified Silicone Intraocular Lenses in Association with Asteroid Hyalosis

Chychko,

Khoramnia,

Son

et al. 2024

Ophthalmol Ther

View full text Add to dashboard Cite

New Terminology and Methodology for the Assessment of the Vitreous, Its Floaters and Opacities, and Their Effect on Vision: Standardized and Kinetic Anatomical and Functional Testing of Vitreous Floaters and Opacities (SK VFO Test)

Stanga¹,

Bravo²,

Reinstein³

et al. 2023

Ophthalmic Surg Lasers Imaging Retina

View full text Add to dashboard Cite

Objective: To introduce VFO and SK VFO Test: new, more representative terminology for symptoms of vitreous floaters/opacities (VFO) and new standardized kinetic (SK) anatomical-functional assessment. Materials and Methods: Eight eyes underwent before-after limited vitrectomy (LV): best-corrected visual acuity, low-luminance visual acuity, Minnesota Low Vision Reading Chart near visual acuity in logMAR, contrast sensitivity function (CV1000E), and straylight measurements (SM) (HDA/LDA/C-Quant). SK infrared confocal scanning laser ophthalmoscopy (SK IRcSLO) and swept-source widefield optical coherence tomography (SS-WF-OCT) identified VFO and posterior vitreous detachment (PVD). SK IRcSLO was performed with gaze directed towards the extreme superior, inferior, and lateral directions. Results: Anatomical-functional results after LV improved in 7 eyes (87.5%): objective scatter index (27.34%), disturbance index (47.97%) and C-Quant Log units (2.26%). Pre-LV SK IRcSLO and SS-WFOCT imaging identified dynamic well-defined VFO and PVD status (100%). A residual asymptomatic anterior cortical vitreous-induced shadowing ripple effect was detected post-LV. Conclusions: This is the first objective-standardized test accounting for VFO kinesis and intermittent effect. There is potential for personalizing treatment and establishing best candidates for laser or surgery. [ Ophthalmic Surg Lasers Imaging Retina 2023;54:306–315.]

show abstract

Straylight due to intraocular lens opacification in a patient with asteroid hyalosis

Cited by 4 publications

References 25 publications

Iterative-Trained Semi-Blind Deconvolution Algorithm to Compensate Straylight in Retinal Images

Iterative-Trained Semi-Blind Deconvolution Algorithm to Compensate Straylight in Retinal Images

Material Analysis of Explanted Calcified Silicone Intraocular Lenses in Association with Asteroid Hyalosis

New Terminology and Methodology for the Assessment of the Vitreous, Its Floaters and Opacities, and Their Effect on Vision: Standardized and Kinetic Anatomical and Functional Testing of Vitreous Floaters and Opacities (SK VFO Test)

Contact Info

Product

Resources

About