Lens Implantation
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2021 ◽  
Vol 11 (11) ◽  
pp. 1400
Author(s):  
Anna Maria Sobczak ◽  
Bartosz Bohaterewicz ◽  
Magdalena Fafrowicz ◽  
Aleksandra Domagalik ◽  
Ewa Beldzik ◽  
...  

Background: Cataract is one of the most common age-related vision deteriorations, leading to opacification of the lens and therefore visual impairment as well as blindness. Both cataract extraction and the implantation of blue light filtering lens are believed to improve not only vision but also overall functioning. Methods: Thirty-four cataract patients were subject to resting-state functional magnetic resonance imaging before and after cataract extraction and intraocular lens implantation (IOL). Global and local graph metrics were calculated in order to investigate the reorganization of functional network architecture associated with alterations in blue light transmittance. Psychomotor vigilance task (PVT) was conducted. Results: Graph theory-based analysis revealed decreased eigenvector centrality after the cataract extraction and IOL replacement in inferior occipital gyrus, superior parietal gyrus and many cerebellum regions as well as increased clustering coefficient in superior and inferior parietal gyrus, middle temporal gyrus and various cerebellum regions. PVT results revealed significant change between experimental sessions as patients responded faster after IOL replacement. Moreover, a few regions were correlated with the difference in blue light transmittance and the time reaction in PVT. Conclusion: Current study revealed substantial functional network architecture reorganization associated with cataract extraction and alteration in blue light transmittance.


2021 ◽  
pp. 112067212110491
Author(s):  
Carla Danese ◽  
Paolo Lanzetta

Purpose The aim of this article is to describe an innovative and minimally invasive surgical technique for posterior vitrectomy combined with secondary intraocular lens implantation, using a sutureless scleral fixation Carlevale intraocular lens (I71 FIL SSF Carlevale lens. Soleko IOL Division, Italy). Methods The technique was conducted with only three transconjunctival sclerotomies and a corneal tunnel to perform intraocular lens explantation, posterior vitrectomy and Carlevale intraocular lens implantation. It is easier, quicker, and less invasive than the traditional technique with conjunctival peritomy, two scleral flaps and five sclerotomies. Results Surgery was performed uneventfully on three eyes of three patients. Two of them presented a luxation of the intraocular lens into the vitreous chamber, while one patient presented an intraocular lens subluxation. No complications were observed after a 5 to 8 months of follow-up. The intraocular lenses were well positioned, no conjunctival erosion was noted, and the intraocular pressure remained normal at all stages. Conclusions This is the first report of a combined procedure of IOL explantation, posterior vitrectomy and secondary IOL implantation using only three transconjunctival sclerotomies. This appears to be less invasive and it causes less discomfort to the patient. We suggest considering this technique in all those cases requiring a combined procedure in absence of a proper capsular support.


2021 ◽  
Vol Volume 15 ◽  
pp. 4181-4187
Author(s):  
Fermín Silva Cayatopa ◽  
Ana Luisa González Méndez ◽  
Robinson Barrientos Ortiz ◽  
Alejandro Silva Diaz ◽  
Fernando Godin Estrada

2021 ◽  
Vol 238 (10) ◽  
pp. 1058-1064
Author(s):  
Luc Van Os ◽  
Göran Darius Hildebrand ◽  
Marie-José Tassignon

Abstract Background Subluxation of the crystalline lens in childhood confronts the surgeon with a dilemma: to operate or to wait and see. Surgery is usually not performed when the subluxation is still limited. However, postponing the surgery increases the surgical difficulty as the capsular bag becomes more difficult to use as a means of support for the intraocular lens (IOL). A large number of children already present a pronounced subluxation at first presentation. In this paper, we describe a technique to optimise centration and fixation of the bag-in-the-lens (BIL) IOL in children younger than 7 years of age with congenital ectopia lentis. Methods Between October 2019 and December 2020, we performed lens extraction using a combination of bean-shaped segments to support the BIL IOL and a 6 – 0 polypropylene loop fixated at the sclera, following the Yamane technique, for the purpose of centration. We used this technique for seven eyes of four patients. The patients were between 2 and 6 years old; 3 boys and 1 girl. A definite diagnosis of Marfan syndrome was made for two children; for the other two, there was no proven underlying pathology. The luxation was upwards in all cases. The degree of luxation was severe in all eyes. The preoperative refraction values showed high astigmatism values for all eyes, ranging from 6.5 to 11.25 dioptres. Three out of the four patients were myopic, ranging from − 1.5 to − 9 dioptres. Results The surgery could be performed without major complications in all eyes. Good centration was obtained, which remained stable in the postoperative period. Refraction improved with greatly diminished degrees of astigmatism (ranging from 0.25 to 3 dioptres) and myopia (spheres ranging from − 2 to + 1.75 dioptres). Conclusion Our novel technique incorporated the BIL technique with the addition of bean-shaped segments and a polypropylene 6/0 suture fixated at the sclera. In this way, we were able to obtain good centration and stability of the implanted IOL, as well as a good refractive outcome in all cases.


2021 ◽  
Author(s):  
Dan Liu ◽  
Cong Fan ◽  
Chunyan Li ◽  
Jian Jiang

Abstract Background: Multifocal intraocular lenses (IOLs) is very intolerant to residual corneal astigmatism and patients with more than 1.0 D of residual corneal astigmatism are not suitable candidates for implantation of multifocal IOLs. The purpose of this study was to evaluate the efficacy of a single clear corneal incision (CCI) or an opposite clear corneal incision (OCCI) made on a steep meridian for correction of low to moderate corneal astigmatism during implantation of multifocal IOLs.Methods: This is a retrospective cohort study. A total of 80 patients with pre-operative total corneal astigmatism, ranging between 0.5 and 2.0 diopters (D), who underwent cataract surgery and received multifocal IOLs were included. Correction of corneal astigmatism was done via single CCIs on steep meridians in patients with 0.5–1.2 D total corneal astigmatisms, and OCCIs in patients with 1.3–2.0 D total corneal astigmatisms. Visual acuity, corneal astigmatism, ocular aberrations, corneal aberrations, and subjective vision quality were evaluated after surgery.Results: At 12-weeks post-surgery, the mean uncorrected distance vision acuity (UDVA) was 0.06±0.09 logarithm of the minimum angle of resolution (logMAR) and 0.03±0.09 logMAR, and the mean uncorrected near vision acuity(UNVA) was 0.08±0.11 logMAR and 0.09±0.09 logMAR in the CCI and OCCI groups, respectively. The change in corneal astigmatism was 0.52 ± 0.22D and 1.06 ± 0.23D in the CCI and OCCI groups, respectively (P<0.001). Total corneal higher-order aberrations (HOAs) and trefoil increased in both groups (P<0.05); however, there was no difference in the change in total corneal HOAs between the two groups (P>0.05). Conclusions: CCI and OCCI made on a steep axis could be an option for correction of mild-to-moderate astigmatism during cataract surgery with multifocal IOL implantation.


2021 ◽  
Vol 14 (2) ◽  
pp. 17-26
Author(s):  
Xiaoyuan Wang ◽  
Sergey Yu. Astakhov ◽  
Vitaly V. Potemkin ◽  
Albina R. Potemkina ◽  
Liliya K. Anikina

Background. Cataract is often associated with primary glaucoma. Prostaglandin analogues use is considered to be a risk factor for pseudophakic cystoid macular edema. Purpose. To evaluate the effect of prostaglandin analogues and non-steroidal anti-inflammatory drops on the central retinal thickness and the incidence of pseudophakic cystoid macular edema after phacoemulsification with intraocular lens implantation in patients with primary open-angle glaucoma. Materials and methods. 91 patients were enrolled in the study. 22 patients (22 eyes) were included in the first main group and 22 patients (22 eyes) were included in the second main groups. All patients in main groups had glaucoma and used prostaglandin analogues. 47 patients (57 eyes) without glaucoma were included in the control group. All patients were treated with topical antibiotics and steroids after phacoemulsification. Patients in the main second and in the control groups also received non-steroidal anti-inflammatory drops. The retinal thickness was measured by optical coherence tomography 2 weeks, 2 months and 6 months after the operation. Results. After the operation, the foveal thickness in patients of the first and the second groups was increased, but it had returned to the preoperative level after 6 months in the first group and after 2 months in the second group. The retinal thickness in the fovea in the control group decreased after the surgery and it has been increasing gradually but did not achieve the preoperative value. Conclusion. Prostaglandin analogues use after phacoemulsification with intraocular lens implantation does not affect the incidence of pseudophakic cystoid macular edema. Prescribing non-steroidal anti-inflammatory drops after the surgery helps to achieve faster normalization of the central retinal thickness.


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