Intraocular Lens
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2021 ◽  
Vol 10 (1) ◽  
pp. e00062
Author(s):  
Hamish D. McKee ◽  
Vishal Jhanji

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 ◽  
Vol 8 (3) ◽  
pp. 1-6
Author(s):  
Filippo Confalonieri ◽  
◽  
Raffaele Piscopo ◽  
Stefania Leuci ◽  
Paolo Vinciguerra ◽  
...  

he aim of this study is to evaluate the effectiveness of phacoemulsification and Intraocular Lens (IOL) implantation in OcMMP patients. Data from 15 eyes of 10 patients affected by OcMMP that underwent phaco+IOL have been evaluated. Each patient was examined a week before surgery and at day 1, day 3, day 7 and 30 days after surgery


2021 ◽  
Vol 21 (1) ◽  
Author(s):  
Young-chae Yoon ◽  
Minji Ha ◽  
Woong-Joo Whang

Abstract Background This study aimed to compare surgically induced astigmatism (SIA) on the anterior and total cornea during cataract surgery through a 2.2 mm steep meridian incision. Methods The study included 69 left eyes of 69 patients who had undergone cataract surgery. The 69 eyes were classified into three subgroups according to the preoperative steep meridian. Following phacoemulsification, an intraocular lens was inserted into the bag. The keratometric measurements were taken 12 months postoperatively, on the anterior cornea (automated keratometer and anterior keratometry [K] from a rotating Scheimpflug camera) and total cornea (equivalent K reading [EKR] 3.0 mm, EKR 4.5 mm, total corneal refractive power (TCRP) 2.0 mm ring, TCRP 3.0 mm zone, TCRP 4.0 mm zone). The SIA was analyzed for each parameter. Results On the double-angle polar plot, the summated vector mean values of SIA determined by the automated keratometer and Scheimpflug anterior K were 0.28 diopter (axis: 177°) and 0.37 diopter (axis: 175°) in with-the-rule (WTR) astigmatism; 0.03 diopter (axis: 156°) and 0.18 diopter (axis: 177°) in oblique astigmatism; 0.15 diopter (axis: 96°) and 0.17 diopter (axis: 73°) in against-the-rule (ATR) astigmatism. The mean SIAs on the total cornea ranged from 0.31 to 0.42 diopter in WTR astigmatism; from 0.16 to 0.27 diopter in oblique astigmatism; from 0.04 to 0.11 diopter in ATR astigmatism. Mean magnitude SIA ranged from 0.41 to 0.46 diopter on anterior corneal surface and 0.50 to 0.62 diopter on total cornea. J0 and J45 of the posterior cornea showed no significant changes after cataract surgery, and the changes in J0 and J45 did not show any statistical differences between the anterior and total cornea (all p > 0.05). Conclusions There were no differences in the summed vector mean values of SIA between the anterior cornea and the total cornea.


2021 ◽  
Vol 9 (2) ◽  
pp. 32-39
Author(s):  
O.U. Denisyuk

Background. It is currently impossible to draw definitive conclusions whether phacoemulsification (PhE) is safe for people with age-related macular degeneration (ARMD). It is not clear if PhE causes the progression of ARMD and affects visual acuity (VA). The purpose was to analyze the possible association of PhE with ARMD progression in the early and late (up to 18 months after surgery) period. Materials and methods. The study included 86 patients (93 eyes), 37 men and 49 women aged 60 to 82 years, who were operated for PhE (implantation of soft intraocular lens on the camera Infiniti, “Alcon”, USA). ARMD was assessed based on the classification of the American Academy of Ophthalmologists (AREDS, 2001). Patients were examined 1, 3, 6, 12 and 18 months after surgery. For statistical processing of obtained data, Statistica 10 (StatSoft, Inc., USA) and MedCalc Statistical Software 18 (MedCalc Software bvba, Belgium) were used. Results. In 69.9 % of eyes with cataract, ARMD was registered: early and midstage (AREDS 2 and 3) was diagnosed in 16.1 % of cases, late stage (AREDS 4.1) — in 25.8 %, and exudative (AREDS 4.2) — in 28.0 %. VA before surgery was consistent with the stage of ARMD and was worse in AREDS 4. To evaluate the progression of ARMD, the index of progression (IP) was developed characterizing the average rate of ARMD clinical manifestations change. The progression of ARMD within 18 months (IP > 0) after the PhE was observed in 33.3 % of cases, including 12.9 % of first determined ARMD. Patients without ARMD progression were 6 years younger than those that had progression (p = 0.001). When IP = 0.100, the disorder progressed at the early stages (3 months); when IP = 0.033, in the later period (12 and 18 months). After surgery, VA was significantly increased, which depended on the initial stage of ARMD (VA was worse at the late stage and in AREDS 4) and ARMD progression (VA was worse when IP > 0, and in the cases of progression when IP = 0.033, that is, with the later ARMD progression). Conclusions. The characteristics of the stages of ARMD and VA dynamics after PhE suggest a positive impact of PhE on the ARMDS progression.


2021 ◽  
pp. 112067212110500
Author(s):  
Harry W. Roberts ◽  
Chrishan D. Gunasekera ◽  
Elizabeth M. Law ◽  
Mohamed Seifelnasr ◽  
Giuseppe Giannaccare ◽  
...  

Purpose To report the outcomes of a new technique, pull-through sutureless ‘mini-DSAEK’, to manage corneal perforations secondary to different aetiologies including trauma, neurotrophic ulcer following penetrating keratoplasty (PK), herpes simplex keratitis and microbial keratitis. Methods In this retrospective case series, we report the clinical outcomes of five cases of sutureless tectonic mini-DSAEK performed in patients presenting with large corneal perforations to Southend University Hospital between November 2019 and October 2020. One corneal perforation was sufficiently peripheral for the tectonic mini-DSAEK graft to be successfully positioned outside of the central visual axis. Four corneal perforations were central or paracentral for which the tectonic grafts involved the visual axis. Results Anterior chambers remained deep and formed with no evidence of leak in all subsequent follow ups in all patients representing 100% tectonic success. All tectonic grafts remained attached except one partially detached graft. One patient underwent uneventful phacoemulsification with intraocular lens implant 8 months after the primary intervention with excellent visual outcome. Two patients underwent two-piece mushroom PK and one patient underwent triple procedure (cataract extraction   +   intraocular lens   +   PK) for visual rehabilitation 2–6 months after the primary intervention with good visual outcome. Conclusion Sutureless tectonic pull-through mini-DSAEK is a useful technique in the management of corneal perforations, with a number of advantages compared with conventional techniques.


Author(s):  
Zoraida Solaiga Gaurisankar ◽  
Gwyneth A. van Rijn ◽  
Yanny Y. Y. Cheng ◽  
Gregorius P. M. Luyten ◽  
Jan-Willem M. Beenakker

Abstract Purpose To describe and present results after a technique for cataract surgery combined with explantation of an iris-fixated phakic intraocular lens (IF-pIOL). Methods The medical records of all patients, who had undergone cataract surgery combined with IF-pIOL explantation and subsequent implantation of a posterior chamber IOL by the Single Incision Technique (SIT), were reviewed. Data collection included preoperative and postoperative corrected distance visual acuity (CDVA), manifest refraction, and endothelial cell density (ECD) up to a follow-up time of 24 months. Results Fifty myopic eyes (34 patients) and 9 hyperopic eyes (6 patients) had undergone a SIT procedure mainly because of cataract (67%). Postoperative CDVA improved in both the myopic eyes to 0.16 ± 0.37 logMAR, as in the hyperopic eyes to − 0.10 ± 0.55 logMAR with no eyes having loss of Snellen lines. Mean postoperative spherical equivalent was − 0.34 ± 0.72 D and − 0.10 ± 0.55 D, respectively. ECD loss 6 months after surgery was 5% and remained stable thereafter. Conclusion SIT for combined phacoemulsification and IF-pIOL removal yields good visual and refractive results and is a safe procedure in regard to ECD loss. The technique has advantages over the conventional procedure and is easy to perform.


2021 ◽  
Vol 62 (10) ◽  
pp. 1435-1439
Author(s):  
Tae Hwan Kim ◽  
Moon Kyung Shin ◽  
Yoon Hyung Kwon

Purpose: To report a case of Exophiala endophthalmitis after cataract surgery, which has not been reported previously in Korea.Case summary: A 70-year-old woman visited the hospital 7 days after cataract surgery in her right eye with unilateral vision impairment. At the time of the visit, visual acuity of the right eye was hand motion, and the fundus was not clearly observed due to numerous inflammatory cells with hypopyon in the anterior chamber. With an initial diagnosis of suspected bacterial endophthalmitis, vitrectomy was performed immediately with intravitreal injection of antibiotics and steroid. On day 14 after vitrectomy, inflammation in the anterior chamber and vitreous opacity worsened, and complete vitrectomy, including of the vitreous base, and removal of the intraocular lens and capsule was performed. Exophiala was detected in the biopsy specimen on day 6 after the second surgery, and the patient was discharged with a prescription for voriconazole eye drops. On day 23 after the second surgery, the best-corrected visual acuity in the right eye had improved to 1.0, and there was no evidence of endophthalmitis recurrence and no observed additional abnormal findings of the fundus until 6 months after second surgery.Conclusions: In a case of fungal endophthalmitis that occurred after cataract surgery, good results were obtained by vitrectomy involving complete removal of the peripheral vitreous body, including the intraocular lens and lens capsule, which was the basis for growth of the fungus in the early stage of endophthalmitis.


2021 ◽  
Vol 21 (1) ◽  
Author(s):  
Jinsoo Kim ◽  
Mee Kum Kim ◽  
Yuseung Ha ◽  
Hae Jung Paik ◽  
Dong Hyun Kim

Abstract Background To evaluate the effects of pretreatment for dry eye disease (DED) on the accuracy of intraocular lens (IOL) power calculation. Methods Patients who underwent uneventful cataract surgery were included in the study. IOL power was determined using the SRK/T and Barrett Universal II (Barrett) formulas. The patients were divided into non-pretreatment and pretreatment groups, and those in the pretreatment group were treated with topical 0.5% loteprednol etabonate and 0.05% cyclosporin A for 2 weeks prior to cataract surgery. Ocular biometry was performed in all groups within 2 days before surgery. The mean prediction error, mean absolute error (MAE), and proportions of refractive surprise were compared between the non-pretreatment and pretreatment groups at 1 month postoperatively. Refractive surprise was defined as MAE ≥ 0.75D. Results In a total of 105 patients, 52 (52 eyes) were in the non-pretreatment group and 53 (53 eyes) in the pretreatment group. The MAE was 0.42 ± 0.33, 0.38 ± 0.34 (SRK/T, Barrett) and 0.23 ± 0.19, 0.24 ± 0.19 in the non-pretreatment and pretreatment groups, respectively (p < 0.001/=0.008). The number of refractive surprises was also significantly lower in the pretreatment group. [non-pretreatment/pretreatment: 9/2 (SRK/T); 8/1 (Barrett); p = 0.024/0.016]. Pretreatment of DED was related to a reduction in postoperative refractive surprise. [SRK/T/Barrett: OR = 0.18/0.17 (95% CI: 0.05–0.71/0.05–0.60), p = 0.014/0.006]. Conclusions The accuracy of IOL power prediction can be increased by actively treating DED prior to cataract surgery.


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