نتایج جستجو برای: visual acuity loss
تعداد نتایج: 788985 فیلتر نتایج به سال:
purpose: to evaluate the success rate of nd:yag laser membranotomy in patients with diabetic premacular hemorrhage. methods: this interventional case series included 24 eyes of 22 patients referred to retina clinic of farabi eye hospital, tehran, iran during 2000-2007 with chief complaint of sudden loss of vision and clinical diagnosis of premacular hemorrhage due to proliferative diabetic reti...
AIMS To establish the frequency and risk factors for visual loss in a primary referral cohort of hospital patients with uveitis. METHODS 561 consecutive uveitis patients attending three district hospitals were recruited and the acuity at the end of the study period recorded. A retrospective case-control study of risk factors for visual loss (permanent loss of acuity <6/9) was performed. Risk ...
Small refractive errors present a group of specifc far-sighted refractive dispositions that are compensated by enhanced accommodative exertion and aren't exhibited by loss of the visual acuity. This paper should answer a few questions about their correction, flowing from theoretical presumptions and expectations of this dilemma. The main goal of this research was to (dis)confirm the hypothesis ...
purpose: to determine factors that affect and predict final visual acuity, retinal attachment, and ocular survival after open-globe injuries. methods: one-hundred sixteen eyes with open globe injuries were evaluated longitudinally from september 2001to february 2004. age, sex, involved eye, best corrected visual acuity (bcva), afferent pupillary defect (apd), size and location of laceration, ca...
OBJECTIVE To evaluate how often visual acuity outcomes are reported in the ophthalmological literature as best or final outcomes, despite potential bias with this type of analysis, as compared with interval outcomes, when a specific condition may continue to cause gain or loss of visual acuity beyond the time that the best or final outcome is determined. METHODS Each article published in the ...
OBJECTIVE Cross-sectional studies of optical coherence tomography (OCT) show that retinal nerve fiber layer (RNFL) thickness is reduced in multiple sclerosis (MS) and correlates with visual function. We determined how longitudinal changes in RNFL thickness relate to visual loss. We also examined patterns of RNFL thinning over time in MS eyes with and without a prior history of acute optic neuri...
We present a rare case of optochiasmatic cavernous angioma (CA) misdiagnosed as teratoma prior to surgery. A 28-year-old male patient presented with progressive loss of visual acuity and headache. Neuroophthalmologic examination revealed left homonymous hemianopsia and decreased visual acuity (right eye 0.6, left eye 0.7). A total resection operation of the lesion was performed via the pteriona...
INTRODUCTION The high output of night vision goggles (NVGs) can cause a loss of dark adaptation, resulting in suboptimal unaided vision. Optical filters have been designed to mitigate this problem by changing the overall output characteristics of the NVGs. METHODS Several aspects of visual performance related to NVG use were studied in a repeated measures design, filters versus no filters. NV...
BACKGROUND/AIM Epidemiological studies of blindness in a working age population require a precise definition of the true connection of uveitis and visual damage. Since most patients with more severe types of uveitis are hospitalized in tertiary referral uveitis service, our aim was to determine whether age, sex and age of onset of uveitis, as well as duration of visual loss and its causes influ...
The visual acuity, the difference in sensitivity of the two eyes to light (brightness ratio), and contrast sensitivity were assessed in 28 patients with chronic open angle glaucoma and compared with those of 41 normal controls of similar ages and visual acuity. The results obtained were related to the results of Tübingen visual field analysis in patients with glaucoma. Twenty-four of the 28 gla...
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