Abstract:
Purpose:To characterize the relative contributions of intraocular pressure (IOP) and intracranial pressure (ICP) on lamina cribrosa (LC) behavior, specifically LC depth (LCD) and LC peak strain. Methods:An axially symmetric finite element model of the posterior eye was constructed with an elongated optic nerve and retro-orbital subarachnoid space ensheathed by pia and dura mater. The mechanical environment in LC was evaluated with ICP ranging from 5 to 15 mmHg and IOP from 10 to 45 mmHg. LCD and LC peak strains at various ICP and IOP levels were estimated using full factorial experiments. Multiple linear regression analyses were then applied to estimate LCD and LC peak strain using ICP and IOP as independent variables. Results:Both increased ICP and decreased IOP led to a smaller LCD and LC peak strain. The regression correlation coefficient for LCD was -1.047 for ICP and 1.049 for IOP, and the ratio of the two regression coefficients was -1.0. The regression correlation coefficient for LC peak strain was -0.025 for ICP and 0.106 for IOP, and the ratio of the two regression coefficients was -0.24. A stiffer sclera increased LCD but decreased LC peak strain; besides, it increased the relative contribution of ICP on the LCD but decreased that on the LC peak strain. Conclusions:ICP and IOP have opposing effects on LCD and LC peak strain. While their effects on LCD are equivalent, the effect of IOP on LC peak strain is 3 times larger than that of ICP. The influences of these pressure are dependent on sclera material properties, which might explain the pathogenesis of ocular hypertension and normal-tension glaucoma.
journal_name
J Ophthalmoljournal_title
Journal of ophthalmologyauthors
Tong J,Ghate D,Kedar S,Gu Ldoi
10.1155/2019/3064949subject
Has Abstractpub_date
2019-03-17 00:00:00pages
3064949eissn
2090-004Xissn
2090-0058journal_volume
2019pub_type
杂志文章abstract::Purpose. To evaluate the relationship between the macular ganglion cell complex (mGCC) thickness, which is the sum of the retinal nerve fiber, ganglion cell, and inner plexiform layers, measured with a spectral-domain optical coherence tomograph and the optic nerve head topography measured with a confocal scanning las...
journal_title:Journal of ophthalmology
pub_type: 杂志文章
doi:10.1155/2011/914250
更新日期:2011-01-01 00:00:00
abstract:Purpose:To identify the clinical characteristics and risk factors for secondary choroidal neovascularization (CNV) in central serous chorioretinopathy (CSC). Methods:In this retrospective study, we included a total of 108 eyes in 106 CSC patients. Group A was defined as patients initially diagnosed with CSC who develo...
journal_title:Journal of ophthalmology
pub_type: 杂志文章
doi:10.1155/2020/7217906
更新日期:2020-02-07 00:00:00
abstract:Background:The advantage of using an autostereoscopic smartphone is that it can achieve 3D effects without the need for glasses. The purpose of this study was to evaluate whether this technology could be utilized to detect stereoacuity. Methods:An autostereoscopic smartphone was used to imitate Lang stereotest I & II,...
journal_title:Journal of ophthalmology
pub_type: 杂志文章
doi:10.1155/2019/1570309
更新日期:2019-10-31 00:00:00
abstract::Age-related macular degeneration (AMD) is one of the main socioeconomical health issues worldwide. AMD has a multifactorial etiology with a variety of risk factors. Smoking is the most important modifiable risk factor for AMD development and progression. The present review summarizes the epidemiological studies evalua...
journal_title:Journal of ophthalmology
pub_type: 杂志文章,评审
doi:10.1155/2013/895147
更新日期:2013-01-01 00:00:00
abstract::The functional visual acuity test which is the average of the visual acuities measured during a specific time frame (standard, 60 seconds) has been used recently to assess the visual function in various conditions. The availability of a shorter version of the functional visual acuity test promises to be patient friend...
journal_title:Journal of ophthalmology
pub_type: 杂志文章
doi:10.1155/2019/8950418
更新日期:2019-09-10 00:00:00
abstract::Background. The aim of this study is to investigate the ocular thermographic profiles in age-related macular degeneration (AMD) eyes and age-matched controls to detect possible hemodynamic abnormalities, which could be involved in the pathogenesis of the disease. Methods. 32 eyes with early AMD, 37 eyes with atrophic ...
journal_title:Journal of ophthalmology
pub_type: 杂志文章
doi:10.1155/2014/281010
更新日期:2014-01-01 00:00:00
abstract:Purpose:Glaucoma is the leading cause of irreversible blindness throughout the world. The pathogenesis of glaucoma is complex, and neuroprotection is a crucial aspect of therapy. High concentrations of extracellular glutamate are toxic to the optic nerve. The glutamate-aspartate transporter (GLAST) in retinal Müller ce...
journal_title:Journal of ophthalmology
pub_type: 杂志文章
doi:10.1155/2018/6128470
更新日期:2018-10-31 00:00:00
abstract:Purpose:The purpose of this study was to evaluate 2-year visual outcomes in patients with diabetic macular edema (DME) treated with anti-VEGF agents in a routine clinical setting. Methods:The medical records of patients treated with ranibizumab or aflibercept due to DME at the Eye Hospital, University Medical Centre L...
journal_title:Journal of ophthalmology
pub_type: 杂志文章
doi:10.1155/2020/6979758
更新日期:2020-03-16 00:00:00
abstract::Purpose. To compare near, intermediate, and distance vision and quality of vision, when refractive rotational multifocal intraocular lenses with 3.0 diopters or diffractive multifocal intraocular lenses with 2.5 diopters near addition are implanted. Methods. 41 eyes of 41 patients in whom rotational +3.0 diopters near...
journal_title:Journal of ophthalmology
pub_type: 杂志文章
doi:10.1155/2016/1395302
更新日期:2016-01-01 00:00:00
abstract::Objective. The purpose of this study was to examine how patient, physician, and situational factors are associated with the extent to which providers educate patients about glaucoma and glaucoma medications, and which patient and provider characteristics are associated with whether providers educate patients about gla...
journal_title:Journal of ophthalmology
pub_type: 杂志文章
doi:10.1155/2014/238939
更新日期:2014-01-01 00:00:00
abstract:Purpose:To evaluate intraoperative complications and utilization of adjunctive devices between microscope and intracameral illuminations during cataract surgery in the elderly over 75 years. Design:A retrospective, consecutive, interventional case series Participants. Two hundred eighty-six eyes of 184 patients older ...
journal_title:Journal of ophthalmology
pub_type: 杂志文章
doi:10.1155/2019/1594152
更新日期:2019-01-10 00:00:00
abstract::Zeaxanthin is a nutritional carotenoid with a considerable amount of safety data based on regulatory studies, which form the basis of its safety evaluation. Subchronic OECD guideline studies with mice and rats receiving beadlet formulations of high purity synthetic zeaxanthin in the diet at dosages up to 1000 mg/kg bo...
journal_title:Journal of ophthalmology
pub_type: 杂志文章,评审
doi:10.1155/2016/3690140
更新日期:2016-01-01 00:00:00
abstract:Purpose:To analyze the results of three-year outcomes of combined epithelium-on cross-linking with femtosecond laser ICRS (cross-linking PLUS) for keratoconus management. Design:A retrospective multicenter clinical study. Methods:43 eyes of 38 patients were subjected to preoperative and postoperative UCVA, BCVA, refr...
journal_title:Journal of ophthalmology
pub_type: 杂志文章
doi:10.1155/2018/6907573
更新日期:2018-01-17 00:00:00
abstract::Purpose. To investigate the association of birth parameters with refractive status in different age groups of Caucasian children. Materials and Methods. This cross-sectional study included 564 eyes of 282 children aged 4 to 17 years. All children underwent complete ophthalmologic examination. The children were divided...
journal_title:Journal of ophthalmology
pub_type: 杂志文章
doi:10.1155/2015/635682
更新日期:2015-01-01 00:00:00
abstract:Objective:To determine whether accommodation induced by reading alters intraocular pressure (IOP) in healthy, young, emmetropic adults and to document the duration and magnitude of this effect. Design:Cross-sectional study. Participants. Fifteen healthy, emmetropic young adults. Methods:Subjects performed 20 minutes ...
journal_title:Journal of ophthalmology
pub_type: 杂志文章
doi:10.1155/2020/1352434
更新日期:2020-01-28 00:00:00
abstract:Purpose:To identify and correlate age-related changes in outer retinal layers' thickness and choroidal thickness (CT) in the normal eyes using spectral-domain optical coherence tomography (SD-OCT) and to investigate factors affecting these changes. Study Design:Observational cross-sectional study. Subjects and Method...
journal_title:Journal of ophthalmology
pub_type: 杂志文章
doi:10.1155/2019/1698967
更新日期:2019-07-31 00:00:00
abstract::Purpose. To compare the mean corneal power (Km) and total astigmatism (Ka) estimated by three methods: simulated keratometry (simK), true net power (TNP), and total corneal refractive power (TCRP) before and after femtosecond laser small incision lenticule extraction (SMILE) surgery. Methods. A retrospective, cross-se...
journal_title:Journal of ophthalmology
pub_type: 杂志文章
doi:10.1155/2017/9659481
更新日期:2017-01-01 00:00:00
abstract::Purpose. To evaluate functional and anatomical results of pars plana vitrectomy (PPV) in the retinal detachment (RD) followed by severe eye trauma. Methods. Retrospective analysis of medical records of forty-one consecutive patients treated with 23-gauge PPV due to traumatic RD. Age, gender, timing of PPV, visual acui...
journal_title:Journal of ophthalmology
pub_type: 杂志文章
doi:10.1155/2017/5084319
更新日期:2017-01-01 00:00:00
abstract::Objective. To describe the clinicoradiological and histopathological findings in a case of lacrimal gland enlargement secondary to lymphomatoid granulomatosis (LG) and to review the literature. Design. Case report and systematic literature review. Methods. A 75-year-old woman presented with right ptosis. Computerised ...
journal_title:Journal of ophthalmology
pub_type:
doi:10.1155/2010/358121
更新日期:2010-01-01 00:00:00
abstract:Purpose:Lanosterol synthase (LSS) abnormity contributes to lens opacity in rats, mice, dogs, and human congenital cataract development. This study examined whether LSS pathway has a role in different subtypes of age-related cataract (ARC). Methods:A total of 390 patients with ARC and 88 age-matched non-ARC patients we...
journal_title:Journal of ophthalmology
pub_type: 杂志文章
doi:10.1155/2018/4125893
更新日期:2018-07-11 00:00:00
abstract:Purpose:The purpose of this meta-analysis was to assess the percent reduction in the intraocular pressure (IOP) after argon laser peripheral iridoplasty (ALPI) and systemic medical therapy in patients with acute primary angle closure (APAC). Methods:We searched a number of electronic databases, including MEDLINE, EMBA...
journal_title:Journal of ophthalmology
pub_type: 杂志文章,评审
doi:10.1155/2019/7697416
更新日期:2019-05-02 00:00:00
abstract::Purpose. To investigate the agreement between morphometric optic nerve head parameters assessed with the confocal laser ophthalmoscope HRT III and the stereoscopic fundus camera Kowa nonmyd WX3D retrospectively. Methods. Morphometric optic nerve head parameters of 40 eyes of 40 patients with primary open angle glaucom...
journal_title:Journal of ophthalmology
pub_type: 杂志文章
doi:10.1155/2016/4764857
更新日期:2016-01-01 00:00:00
abstract::Purpose. To determine the efficacy of 23-gauge pars plana vitrectomy (PPV) for symptomatic posterior vitreous detachment (PVD) on visual acuity (VA) and quality after multifocal intraocular lenses (IOLs). Methods. In this prospective case series, patients who developed symptomatic PVD and were not satisfied with visua...
journal_title:Journal of ophthalmology
pub_type: 杂志文章
doi:10.1155/2015/156910
更新日期:2015-01-01 00:00:00
abstract:Purpose:To analyse the correlation of myopia with physical exercise and sleep habits to explore the possible risk or protective factors of juvenile myopia. Methods:This study was a retrospective cross-sectional study. A total of 1831 students aged 11-18 years from five schools in Qingpu completed questionnaires from 2...
journal_title:Journal of ophthalmology
pub_type: 杂志文章
doi:10.1155/2020/2670153
更新日期:2020-07-25 00:00:00
abstract:Purpose:To present a new method of measuring ocular axial dimensions, termed OCT biometry (B-OCT). Design:Observational cross-sectional study and evaluation of new diagnostic technology. Methods:B-OCT was implemented in the spectral domain OCT device for posterior and anterior segment imaging (REVO NX, Optopol Techno...
journal_title:Journal of ophthalmology
pub_type: 杂志文章
doi:10.1155/2019/9192456
更新日期:2019-08-14 00:00:00
abstract:Purpose:Visual loss is a devastating perioperative complication that can result from elevated intraocular pressure (IOP). The Trendelenburg position during surgery increases IOP. The purpose of this study was to quantify IOP changes in patients undergoing laparoscopic hysterectomy, at different time points and body pos...
journal_title:Journal of ophthalmology
pub_type: 杂志文章
doi:10.1155/2018/1457851
更新日期:2018-03-15 00:00:00
abstract:Purpose:The correlations between the axial length-to-corneal radius (AL/CR) ratio and corneal astigmatism (CA) were studied by prospectively analyzing and comparing survey data from school children in the Beijing urban area from 2014 to 2015. Methods:In this longitudinal study, a total of 2,970 students were enrolled ...
journal_title:Journal of ophthalmology
pub_type: 杂志文章
doi:10.1155/2018/4209236
更新日期:2018-08-30 00:00:00
abstract:Purpose:To examine the current knowledge about the age-related processes in the anterior segment of the eye at a biological, clinical, and molecular level. Methods:We reviewed the available published literature that addresses the aging process of the anterior segment of the eye and its associated molecular and physiol...
journal_title:Journal of ophthalmology
pub_type: 杂志文章,评审
doi:10.1155/2017/1295132
更新日期:2017-01-01 00:00:00
abstract::SD-OCT has become an essential tool for evaluating macular pathology; however several aspects of data collection and analysis affect the accuracy of retinal thickness measurements. Here we evaluated sampling density, scan centering, and axial length compensation as factors affecting the accuracy of macular thickness m...
journal_title:Journal of ophthalmology
pub_type: 杂志文章
doi:10.1155/2011/692574
更新日期:2011-01-01 00:00:00
abstract::Background. We aimed to evaluate the association between maternal smoking and the occurrence of childhood refractive error and amblyopia. Methods. Relevant articles were identified from PubMed and EMBASE up to May 2015. Combined odds ratio (OR) corresponding with its 95% confidence interval (CI) was calculated to eval...
journal_title:Journal of ophthalmology
pub_type: 杂志文章
doi:10.1155/2016/8263832
更新日期:2016-01-01 00:00:00