The impact of late-treated pediatric cataract on intraocular pressure

2021 ◽  
Author(s):  
Itay Ben-Zion ◽  
Daphna Prat
Keyword(s):  
Intraocular Pressure ◽  
Pediatric Cataract ◽  
The Impact

Clinical characteristics and treatment of secondary glaucoma, glaucoma suspects and ocular hypertension after congenital cataract surgery

2021 ◽  
pp. 112067212199135
Author(s):  
Katharina Eibenberger ◽  
Barbara Kiss ◽  
Ursula Schmidt-Erfurth ◽  
Eva Stifter
Keyword(s):  
Intraocular Pressure ◽  
Cataract Surgery ◽  
Ocular Hypertension ◽  
Congenital Cataract ◽  
Case Series ◽  
Secondary Glaucoma ◽  
Visual Axis ◽  
Retrospective Case ◽  
Pediatric Cataract ◽  
Congenital Cataract Surgery

Objective: To evaluate changes in intraocular pressure after congenital cataract surgery in a real-world setting. Methods: This retrospective case series included all children aged 0–2 years undergoing lens extraction due to congenital cataract. Development of an elevated intraocular pressure was divided into three groups: secG, suspG and OHT. Further, risk factors for IOP changes, the therapeutic approach and functional outcome were assessed during follow-up. Results: One hundred and sixty-one eyes of 110 patients aged 0–2 years were included, whereof 29 eyes of 17 children developed secondary glaucoma (secG; 11 eyes/8 patients), glaucoma suspect (suspG; three eyes/three patients) or ocular hypertension (OHT; 15 eyes/10 patients). No difference in surgrical procedure ( p = 0.62) was found, but age at cataract surgery differed significantly ( p = 0.048), with the secG group (1.74 ± 1.01 months) being the youngest (suspG: 3.93 ± 1.80 months; OHT group: 5.91 ± 5.36 months). Secondary surgical intervention was significantly higher in the secG (4.64 ± 3.41) followed by the suspG (2.00 ± 2.65) and OHT groups (0.40 ± 0.74; p < 0.001). Postoperative complications including nystagmus ( p = 0.81), strabismus ( p = 0.98) and amblyopia ( p = 0.73) showed no difference, in contrast to visual axis obscuration which was more common in the secG group ( p = 0.036). Conclusion: Initial lensectomy and anterior vitrectomy procedure together with or without IOL implantation seems to have no influence for the development of IOP changes after pediatric cataract surgery. However, children who developed secondary glaucoma had cataract surgery significantly earlier, within the first 2–3 months of life. Glaucoma surgery was required to achieve final IOP control in most eyes. The development of secondary glaucoma was also associated with a significant increase in surgical re-treatments.

scholarly journals The Impact of Intraocular Pressure Elevation on Optic Nerve Head and Choroidal Blood Flow

2018 ◽  
Vol 59 (8) ◽  
pp. 3488 ◽  
Author(s):  
Naoki Kiyota ◽  
Yukihiro Shiga ◽  
Kohei Ichinohasama ◽  
Masayuki Yasuda ◽  
Naoko Aizawa ◽  
...  
Keyword(s):  
Blood Flow ◽  
Intraocular Pressure ◽  
Optic Nerve ◽  
Optic Nerve Head ◽  
Choroidal Blood Flow ◽  
Pressure Elevation ◽  
Intraocular Pressure Elevation ◽  
The Impact

scholarly journals The Guangzhou Twin Eye Study: 2019 Update

2019 ◽  
Vol 22 (6) ◽  
pp. 492-498
Author(s):  
Xiaohu Ding ◽  
Wei Wang ◽  
Jane Scheetz ◽  
Mingguang He
Keyword(s):  
Intraocular Pressure ◽  
Axial Length ◽  
Corneal Thickness ◽  
Environmental Influences ◽  
Eye Diseases ◽  
Future Research ◽  
Research Directions ◽  
Future Research Directions ◽  
The Impact ◽  
Fundus Photo

AbstractThe primary aim of the Guangzhou Twin Eye Study (GTES) is to explore the impact that genes and environmental influences have on common eye diseases. Since 2006, approximately 1300 pairs of twins, aged 7–15 years, were enrolled at baseline. Progressive phenotypes, such as cycloplegic refraction, axial length, height and weight, have been collected annually. Nonprogressive phenotypes such as parental refraction, corneal thickness, fundus photo, intraocular pressure and DNA were collected once at baseline. We are collaborating with fellow international twin researchers and psychologists to further explore links with general medical conditions. In this article, we review the history, major findings and future research directions for the GTES.

scholarly journals Redistribution of metabolic resources through astrocyte networks mitigates neurodegenerative stress

2020 ◽  
Vol 117 (31) ◽  
pp. 18810-18821 ◽  
Author(s):  
Melissa L. Cooper ◽  
Silvia Pasini ◽  
Wendi S. Lambert ◽  
Karis B. D’Alessandro ◽  
Vincent Yao ◽  
...  
Keyword(s):  
Visual Acuity ◽  
Intraocular Pressure ◽  
Connexin 43 ◽  
Metabolic Networks ◽  
Metabolic Stress ◽  
Intraocular Pressure Elevation ◽  
The Central Nervous System ◽  
Stressed Region ◽  
The Impact ◽  
Neuronal Stress

In the central nervous system, glycogen-derived bioenergetic resources in astrocytes help promote tissue survival in response to focal neuronal stress. However, our understanding of the extent to which these resources are mobilized and utilized during neurodegeneration, especially in nearby regions that are not actively degenerating, remains incomplete. Here we modeled neurodegeneration in glaucoma, the world’s leading cause of irreversible blindness, and measured how metabolites mobilize through astrocyte gap junctions composed of connexin 43 (Cx43). We elevated intraocular pressure in one eye and determined how astrocyte-derived metabolites in the contralateral optic projection responded. Remarkably, astrocyte networks expand and redistribute metabolites along distances even 10 mm in length, donating resources from the unstressed to the stressed projection in response to intraocular pressure elevation. While resource donation improves axon function and visual acuity in the directly stressed region, it renders the donating tissue susceptible to bioenergetic, structural, and physiological degradation. Intriguingly, when both projections are stressed in a WT animal, axon function and visual acuity equilibrate between the two projections even when each projection is stressed for a different length of time. This equilibration does not occur when Cx43 is not present. Thus, Cx43-mediated astrocyte metabolic networks serve as an endogenous mechanism used to mitigate bioenergetic stress and distribute the impact of neurodegenerative disease processes. Redistribution ultimately renders the donating optic nerve vulnerable to further metabolic stress, which could explain why local neurodegeneration does not remain confined, but eventually impacts healthy regions of the brain more broadly.

scholarly journals Impact of Visual Field Testing on Intraocular Pressure Change Trends in Healthy People and Glaucoma Patients

2020 ◽  
Vol 2020 ◽  
pp. 1-6 ◽  
Author(s):  
Mengwei Li ◽  
Bingxin Zheng ◽  
Qi Wang ◽  
Xinghuai Sun
Keyword(s):  
Intraocular Pressure ◽  
Visual Field ◽  
Repeated Measures ◽  
Healthy Subjects ◽  
Open Angle Glaucoma ◽  
Field Testing ◽  
Automated Perimetry ◽  
Open Angle ◽  
Standard Automated Perimetry ◽  
The Impact

Purpose. To compare the impact of visual field (VF) testing on intraocular pressure (IOP) change trends between healthy subjects and glaucoma patients. Methods. We recruited healthy volunteer subjects who did not have previous ocular diseases and open-angle glaucoma patients who were medically controlled well. IOP in both eyes of each participant was measured by using a noncontact tonometer at five time points: before, immediately after (0 minute), and 10, 30, and 60 minutes after the standard automated perimetry. Repeated measures ANOVA was used to analyze the effect of VF testing on IOP change trends in healthy and glaucoma eyes. Results. Forty healthy subjects (80 eyes) and 31 open-angle glaucoma patients (62 eyes) were included for the study. The baseline IOP of healthy and glaucoma eyes was 16.11 ± 3.01 mmHg and 15.78 ± 3.57 mmHg, respectively. After the VF testing, the IOP in healthy eyes was decreased by 1.5% at 0 minute, 6.5% at 10 minutes (P<0.001), 6.6% at 30 minutes (P<0.001), and 7.0% at 1 hour (P<0.001), indicating that this reduction was sustained for at least 1 hour. However, the IOP in glaucoma eyes was increased by 12.7% at 0 minute (P<0.001) and, then, returned towards initial values 1 hour after the VF testing. Conclusions. IOP change trends after VF field testing between healthy subjects and glaucoma patients were quite different. VF testing led to a mild and relatively sustained IOP decrease in healthy subjects, whereas IOP in open-angle glaucoma patients tended to significantly increase immediately after VF testing and, then, returned to pretest values after 1 hour. These findings indicate that the factors of VF testing should be considered in the clinical IOP measurements.

scholarly journals The impact of short-term fenestrated scleral lens wear on intraocular pressure

2020 ◽  
Vol 43 (6) ◽  
pp. 585-588 ◽  
Author(s):  
Samuel Y. Cheung ◽  
Michael J. Collins ◽  
Stephen J. Vincent
Keyword(s):  
Intraocular Pressure ◽  
Short Term ◽  
The Impact ◽  
Lens Wear

scholarly journals Effect of medically lowering intraocular pressure in glaucoma suspects with high myopia (GSHM study): study protocol for a randomized controlled trial

Trials ◽  
2020 ◽  
Vol 21 (1) ◽  
Author(s):  
Feng Bin Lin ◽  
◽  
Shi Da Chen ◽  
Yun He Song ◽  
Wei Wang ◽  
...  
Keyword(s):  
Randomized Controlled Trial ◽  
Intraocular Pressure ◽  
High Myopia ◽  
Primary Outcome ◽  
Controlled Trial ◽  
Secondary Outcome ◽  
Rank Test ◽  
Inner Plexiform Layer ◽  
Randomized Controlled ◽  
The Impact

Abstract Background Currently, whether and when intraocular pressure (IOP)-lowering medication should be used in glaucoma suspects with high myopia (GSHM) remains unknown. Glaucoma suspects are visual field (VF) defects that cannot be explained by myopic macular changes or other retinal and neurologic conditions. Glaucoma progression is defined by VF deterioration. Here we describe the rationale, design, and methodology of a randomized controlled trial (RCT) designed to evaluate the effects of medically lowering IOP in GSHM (GSHM study). Methods The GSHM study is an open-label, single-center, RCT for GSHM. Overall, 264 newly diagnosed participants, aged 35 to 65 years, will be recruited at the Zhongshan Ophthalmic Center, Sun Yat-sen University, between 2020 and 2021. Participants will be randomly divided into two arms at a 1:1 ratio. Participants in the intervention arm will receive IOP-lowering medication, while participants in the control arm will be followed up without treatment for 36 months or until they reach the end point. Only one eye per participant will be eligible for the study. If both eyes are eligible, the eye with the worse VF will be recruited. The primary outcome is the incidence of glaucoma suspect progression by VF testing over 36 months. The secondary outcomes include the incidence of changes in the optic nerve head morphology including the retinal nerve fiber layer, and retinal ganglion cell-inner plexiform layer loss, progression of myopic maculopathy, visual function loss, and change in the quality of life. Statistical analyses will include baseline characteristics comparison between the intervention and control groups using a two-sample t-test and Wilcoxon rank sum test; generalized linear models with Poisson regression for the primary outcome; Kaplan-Meier curve and log-rank test for the incidence of the secondary outcome; and longitudinal analyses to assess trends in outcomes across time. Discussion To the best of our knowledge, the GSHM study is the first RCT to investigate the impact of medically lowering IOP in GSHM. The results will have implications for the clinical management of GSHM. Trial registration ClinicalTrials.gov NCT04296916. Registered on 4 March 2020

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