Abstract:
BACKGROUND:To understand which irregular corneal parameters determine the visual quality in keratoconus subjects. METHODS:The cross-sectional study examined the eyes of 44 subjects, graded from the first to third keratoconus stages by Amsler-Krumeich classification. We obtained measurements in two ways: (a) by projecting two perpendicular axes onto a cornea (first, through the central point of the cornea and keratoconus apex; second, as the perpendicular axis) to read the elevation values at points on these axes as parameters characterising the corneal surface; (b) by projecting circles with different diameters around the central part of the cornea (1, 2, and 3 mm) and reading elevation values at points equally displaced on these circles as parameters characterising an anterior surface slope. Irregular corneal shape parameters' correlations with visual acuity and contrast sensitivity were determined in order to understand which corneal slope parameter has the strongest correlation with visual acuity and contrast sensitivity. RESULTS:Parameters characterising the corneal surface's correlations with contrast sensitivity were from r = 0.25 (p = 0.03) at 3 cpd to r = 0.47 (p < 0.01) at 9 cpd for the highest elevation and from r = 0.33 (p = 0.09) at 5 cpd to r = 0.40 (p < 0.01) at 11 cpd for the lowest elevation in all subjects together, while for visual acuity the parameters were r = 0.30 (p < 0.01) for the highest elevation and r = 0.21 (p = 0.06) for the lowest elevation in all subjects together. The correlation between contrast sensitivity and the highest and lowest corneal point in all measured cornea was stronger for subjects with a peripheral corneal apex than for those with a central apex. In keratoconus subjects, contrast sensitivity displayed a strong correlation with slope in the central part of the cornea (with a radius of 1 mm) ranging from 0.48 (p < 0.01) at 3 cpd to 0.61 (p < 0.01) at 9 cpd. CONCLUSION:Contrast sensitivity has a higher correlation with corneal shape parameters than with visual acuity. Subjects with a peripheral corneal apex had stronger correlations with visual acuity and contrast sensitivity than did subjects with a central apex. In keratoconus subjects, the strongest correlation was for contrast sensitivity and elevation (slope) in the region within a 1 mm radius of the corneal centre in the opposite direction of the keratoconus apex (direction (ax) CB).
journal_name
BMC Ophthalmoljournal_title
BMC ophthalmologyauthors
Liduma S,Luguzis A,Krumina Gdoi
10.1186/s12886-020-01737-xsubject
Has Abstractpub_date
2020-11-26 00:00:00pages
466issue
1issn
1471-2415pii
10.1186/s12886-020-01737-xjournal_volume
20pub_type
杂志文章abstract:PURPOSE:To report a case of atypical herpes simplex keratitis initially diagnosed as bacterial keratitis, in a contact lens wearer. RESULTS:Case report of an 18-year-old woman using contact lenses who presented with pain, redness and gradual decrease in vision in the right eye. Examination revealed a paracentral large...
journal_title:BMC ophthalmology
pub_type: 杂志文章
doi:10.1186/1471-2415-1-1
更新日期:2001-01-01 00:00:00
abstract:BACKGROUND:The aim of this study was to estimate both the direct and indirect annual costs of treating bacterial conjunctivitis (BC) in the United States. This was a cost of illness study performed from a U.S. healthcare payer perspective. METHODS:A comprehensive review of the medical literature was supplemented by da...
journal_title:BMC ophthalmology
pub_type: 杂志文章,评审
doi:10.1186/1471-2415-9-13
更新日期:2009-11-25 00:00:00
abstract:BACKGROUND:To evaluate the safety and effectiveness of the Visian Implantable Collamer Lens (ICL) implantation in high myopic patients with inactive Graves' ophthalmopathy (GO) by observing the changes of choroidal thickness (CT). METHODS:Eight patients (16 eyes) with high myopia accompanied with inactive GO were sele...
journal_title:BMC ophthalmology
pub_type: 杂志文章
doi:10.1186/s12886-020-01612-9
更新日期:2020-08-25 00:00:00
abstract:BACKGROUND:The short-term effects of intravitreal ranibizumab (IVR) on diabetic macular edema (DME) remains unclear. We assessed the short-term effects of IVR on DME. METHODS:Eighteen eyes of 14 patients with DME were enrolled in this prospective interventional case series. After intravitreal ranibizumab was injected ...
journal_title:BMC ophthalmology
pub_type: 杂志文章,随机对照试验
doi:10.1186/s12886-017-0420-8
更新日期:2017-03-14 00:00:00
abstract:BACKGROUND:Older drivers have a crash rate nearly equal to that of young drivers whose crash rate is the highest among all age groups. Contrast sensitivity impairment is common in older adults. The purpose of this study is to examine whether parameters from the photopic and mesopic contrast sensitivity functions (CSF) ...
journal_title:BMC ophthalmology
pub_type: 杂志文章,多中心研究
doi:10.1186/s12886-020-1331-7
更新日期:2020-02-04 00:00:00
abstract:BACKGROUND:To report a rare case of bilateral Purtscher-like retinopathy in a Chinese female patient with dermatomyositis. CASE PRESENTATION:An 18-year-old woman with lower extremity muscle weakness was admitted due to decreased vision of both eyes for two weeks. Ophthalmic examination revealed violaceous eruption on ...
journal_title:BMC ophthalmology
pub_type: 杂志文章
doi:10.1186/1471-2415-13-36
更新日期:2013-07-24 00:00:00
abstract:BACKGROUND:To compare the efficacy of phacoemulsification (PKE) combined with nonpenetrating deep sclerectomy (NPDS) with mitomycin C (MMC) versus XEN® gel stent with MMC. METHODS:In this nonrandomized, retrospective, comparative, single-center pilot study, 105 consecutive eyes of 75 patients with uncontrolled primary...
journal_title:BMC ophthalmology
pub_type: 杂志文章
doi:10.1186/s12886-020-01492-z
更新日期:2020-06-16 00:00:00
abstract:BACKGROUND:This study evaluates the efficacy and tolerability (ie, occurrence and severity of hyperemia) of bimatoprost 0.01% in treatment-naïve patients with open-angle glaucoma (OAG) or ocular hypertension in the Korean clinical setting. METHODS:In this multicenter, open-label, observational study, treatment-naïve p...
journal_title:BMC ophthalmology
pub_type: 杂志文章,多中心研究
doi:10.1186/1471-2415-14-160
更新日期:2014-12-17 00:00:00
abstract:BACKGROUND:To predict the effectiveness of topical glaucoma medications based on initial uniocular and binocular treatment. To test a traditional hypothesis that effectiveness following a uniocular trial is associated with the change in IOP in the initially treated eye minus the change in the initially untreated eye. T...
journal_title:BMC ophthalmology
pub_type: 杂志文章
doi:10.1186/1471-2415-7-17
更新日期:2007-10-05 00:00:00
abstract:BACKGROUND:Iridoschisis is a rare condition that is characterized by the separation of the iris stroma into layers, with portions of the anterior layer floating freely in the aqueous humour. Here, we report three cases of iridoschisis that were complicated by either a cataract or glaucoma. Based on these cases, we spec...
journal_title:BMC ophthalmology
pub_type: 杂志文章,评审
doi:10.1186/s12886-017-0418-2
更新日期:2017-03-14 00:00:00
abstract:BACKGROUND:Proliferative retinopathy is an uncommon feature of Vogt Koyanagi Harada (VKH) disease which might indicate poor uveitis control in these patients. We aim to describe the clinical features and outcome of management of proliferative retinopathy in 2 patients with VKH. CASE PRESENTATION:19 and 33 years old fe...
journal_title:BMC ophthalmology
pub_type: 杂志文章
doi:10.1186/s12886-020-01736-y
更新日期:2020-12-01 00:00:00
abstract:BACKGROUND:Sturge-Weber syndrome (SWS) is a sporadic congenital disorder, characterized by unilateral facial nevus flammeus associated with ipsilateral glaucoma, choroidal angioma and leptomeningeal hemangiomas. SWS can comorbid with other disorders in some patients, however, there has been no prior described case of S...
journal_title:BMC ophthalmology
pub_type: 杂志文章
doi:10.1186/s12886-020-01761-x
更新日期:2021-01-06 00:00:00
abstract:BACKGROUND:Optical coherence tomography angiography is a novel imaging technique that allows dyeless in vivo visualization of the retinal and choroidal vasculature. The purpose of this study was to describe optical coherence tomography (OCT) angiography findings in patients with retinal arterial macroaneurysms (RAMs). ...
journal_title:BMC ophthalmology
pub_type: 杂志文章
doi:10.1186/s12886-016-0293-2
更新日期:2016-07-22 00:00:00
abstract:BACKGROUND:Because latanoprost and the original formulation of travoprost that included benzalkonium chloride (BAK) have been shown to be similar with regard to tolerability, we compared initial topical intraocular pressure (IOP)-lowering medication change rates in patients newly treated with latanoprost or travoprost-...
journal_title:BMC ophthalmology
pub_type: 杂志文章,多中心研究
doi:10.1186/1471-2415-11-13
更新日期:2011-06-13 00:00:00
abstract:BACKGROUND:To evaluate the correlation between visual acuity improvement and vision-related QOL after ranibizumab treatment in Japanese patients with AMD. METHODS:In this one-year prospective, interventional, open-label, multicenter study involving four sites, patients with neovascular AMD were enrolled and observed f...
journal_title:BMC ophthalmology
pub_type: 杂志文章
doi:10.1186/s12886-021-01816-7
更新日期:2021-01-23 00:00:00
abstract:BACKGROUND:Adenovirus (Ad), associated with significant morbidity, has no topical treatment. A leading CTC compound (CTC-96), a Co(III) chelate, was found to have potent in vitro and in vivo antiviral efficacy against herpes viruses. In this study CTC-96 is being tested for possible anti-Adenovirus activity. METHODS:T...
journal_title:BMC ophthalmology
pub_type: 杂志文章
doi:10.1186/1471-2415-6-22
更新日期:2006-06-05 00:00:00
abstract:BACKGROUND:Currently, various types of toric intraocular lenses (IOL) have been manufactured and can be divided into three types according to the location of correction component; front-toric IOL (correction on anterior IOL surface), back-toric IOL (correction on posterior IOL surface), and bi-toric IOL (correction on ...
journal_title:BMC ophthalmology
pub_type: 杂志文章
doi:10.1186/s12886-020-01439-4
更新日期:2020-04-28 00:00:00
abstract:BACKGROUND:The effectiveness of ranibizumab in the treatment of diabetic macular edema has been proven with large clinical trials. For bevacizumab only two clinical trials have been published and a head-to-head comparison is lacking to date. However, if proved non-inferior to ranibizumab, use of the off-label bevacizum...
journal_title:BMC ophthalmology
pub_type: 杂志文章,多中心研究,随机对照试验
doi:10.1186/s12886-015-0043-x
更新日期:2015-07-07 00:00:00
abstract:BACKGROUND:To evaluate therapeutic outcomes of interferon alpha-2a (IFNα2a) treatment in patients with Behcet's disease who were refractory to immunosuppressive agents. METHODS:This retrospective case series reviewed the medical records of 5 patients with refractory Behcet uveitis from January 2011 to February 2017. I...
journal_title:BMC ophthalmology
pub_type: 杂志文章
doi:10.1186/s12886-018-0719-0
更新日期:2018-02-20 00:00:00
abstract:BACKGROUND:Bone marrow transplantation retinopathy is a rare condition affecting the posterior pole. The purpose of this case report is to highlight the possible risk factors and clinical features. CASE PRESENTATION:A 19y old male with relapsed and refractory acute lymphoblastic leukaemia was admitted under haematolog...
journal_title:BMC ophthalmology
pub_type: 杂志文章
doi:10.1186/s12886-018-0855-6
更新日期:2018-09-14 00:00:00
abstract:BACKGROUND:Glial heterotopias are rare, benign, congenital, midline, non-teratomatous extracranial glial tissue. They may masquerade as encephalocoele or dermoid cyst and mostly present in nose. Herein, we present an unusual case of glial heterotopia of the orbit with unilateral blindness. CASE PRESENTATION:A 6 year-o...
journal_title:BMC ophthalmology
pub_type: 杂志文章
doi:10.1186/1471-2415-11-34
更新日期:2011-11-16 00:00:00
abstract:BACKGROUND:Retinal dystrophies display a considerably wide range of phenotypic variability, which can make diagnosis and clinical staging difficult. The aim of the study is to analyze the contribution of retro-mode imaging (RMI) and fundus autofluorescence (FAF) to the characterization of retinal dystrophies. METHODS:...
journal_title:BMC ophthalmology
pub_type: 杂志文章
doi:10.1186/1471-2415-12-8
更新日期:2012-05-15 00:00:00
abstract:BACKGROUND:P66Shc is partially localised within the mitochondrial fraction. It is primarily related to the generation of mitochondrial reactive oxygen species and apoptosis. Based on previous studies, we hypothesize that in the retina, p66Shc may exist and affect the development of diabetic retinopathy. The purpose of ...
journal_title:BMC ophthalmology
pub_type: 杂志文章
doi:10.1186/s12886-018-0724-3
更新日期:2018-02-27 00:00:00
abstract:BACKGROUND:With age, the human lens accumulates variety of substances that absorbs and fluorescence, which explains the color of yellow, brunescent and nigrescent cataract in terms of aging. The aim of this study was to assess lens fluorophores with properties comparable to those of advanced glycated end products (AGEs...
journal_title:BMC ophthalmology
pub_type: 杂志文章
doi:10.1186/1471-2415-6-10
更新日期:2006-03-06 00:00:00
abstract:BACKGROUND:Central corneal thickness (CCT) measurement has become an important test in the diagnosis and management of glaucoma. Currently, ultrasound corneal thickness measurement (pachymetry) is the most frequently used clinical technique and the gold standard to assess CCT. Newer instruments are currently available ...
journal_title:BMC ophthalmology
pub_type: 杂志文章
doi:10.1186/s12886-015-0116-x
更新日期:2015-09-29 00:00:00
abstract:BACKGROUND:Adolescent KC is a special segment of the general KC population because an adolescents's eyes are still susceptible to blurred vision and optical defocus during the sensitive period of ocular and visual development. In the present study, we evaluated the ocular dimensions of 53 KC adolescents. METHODS:One h...
journal_title:BMC ophthalmology
pub_type: 杂志文章
doi:10.1186/s12886-018-0713-6
更新日期:2018-02-13 00:00:00
abstract:BACKGROUND:Pterygium is a condition characterized by epithelial overgrowth of the cornea, inflammatory cell infiltration and an abnormal extracellular matrix accumulation. Chronic UV exposure is considered as a pathogenic factor of this disease. Proteasome is an intracellular multi-subunit protease complex that degrade...
journal_title:BMC ophthalmology
pub_type: 杂志文章
doi:10.1186/s12886-018-0987-8
更新日期:2018-12-18 00:00:00
abstract:BACKGROUND:To report the successful treatment of ocular toxoplasmosis and present the use of multimodal imaging to describe the changes in ocular toxoplasmic lesions subsequent to treatment. CASE PRESENTATION:A 73-year-old female visited the clinic with decreased visual acuity in the left eye. Fundus examination showe...
journal_title:BMC ophthalmology
pub_type: 杂志文章
doi:10.1186/s12886-019-1209-8
更新日期:2019-09-05 00:00:00
abstract:BACKGROUND:Silicone oil tamponade has become a mainstay in treatment of advanced retinal detachment due to multiple etiologies. The aim of this study is to assess the characteristics, fates and complications of long-term silicone oil tamponade after par plana vitrectomy (PPV), and to compare the outcomes of different s...
journal_title:BMC ophthalmology
pub_type: 杂志文章
doi:10.1186/s12886-020-01608-5
更新日期:2020-08-17 00:00:00
abstract:BACKGROUND:To investigate the 3-month postoperative performance and safety after implantation of a trifocal intraocular lens (IOL) in a Korean population. METHODS:This was a clinical, prospective, multicenter, single-arm study. Forty-four subjects (88 eyes) with bilateral cataract with expected postoperative corneal a...
journal_title:BMC ophthalmology
pub_type: 杂志文章
doi:10.1186/s12886-020-01549-z
更新日期:2020-07-15 00:00:00