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Poor Visual Acuity (poor + visual_acuity)
Selected AbstractsNew perspectives of optical coherrence tomography in diagnosis and follow-up of macular holesACTA OPHTHALMOLOGICA, Issue 2009SA KABANAROU Purpose To compare Time Domain (TD) with Spectral Domain (SD) OCT for imaging macular holes, identify retinal pathology and correlate anatomical morphology after surgical intervention for hole closure with visual outcome. Methods 34 eyes of 34 patients with idiopathic macular holes stage II- IV were included in this study. Comparative studies were performed with both SD OCT (Heidelberg, Germany) and TD OCT (Stratus) using standard scanning protocols of 6 radial 6-mm scans through the fovea. All patients underwent a standard three port- pars plana vitrectomy. Postoperatively, all patients were evaluated using both OCTs. ETDRS visual acuities were recorded pre- and post-operatively. Results In general TD and SD OCTs showed comparable images of macular holes. However, the boundary line between the inner and outer segments of the photoreceptors was better imaged with the SD OCT preoperatively and postoperatively. Poor visual acuity postoperatively was measured mainly in cases with morphological disruption in this boundary line despite hole closure. Conclusion SD OCT imaging enhances the visualization of retinal anatomy in macular holes relative to TD OCT. [source] Early postnatal growth variables are related to morphologic and functional ophthalmologic outcome in children born pretermACTA PAEDIATRICA, Issue 5 2010M Hök-Wikstrand Abstract Aim:, To evaluate the association between gestational age (GA), early and late postnatal growth variables and ophthalmologic outcome in ex-preterm children. Methods:, Children (GA < 32 weeks, n = 66), previously examined regarding insulin-like growth factor 1 (IGF-1) serum concentrations in relation to ROP, underwent ophthalmologic examination at median 5.6 years. Weight, height, and head circumference (HC) were measured and expressed as SDS. Growth variables were analysed in relation to ophthalmologic outcome. Results:, At follow-up 74% had some ophthalmologic abnormality and 17% had visual impairment. Poor visual acuity was correlated with low GA (rs = 0.29, p = 0.019), low weight at 32 weeks (rs = 0.30, p = 0.013), and low weight (rs = 0.37, p = 0.0025), height (rs = 0.41, p = 0.0007) and HC (rs = 0.55, p < 0.0001) at follow-up. Hyperopic children (25%) had low neonatal IGF-1 (p = 0.0096) and HC at follow-up (p = 0.022). Poor visual perception was correlated with low early weight (rs = 0.38, p = 0.0036) and HC at follow-up (rs = 0.39, p = 0.0024). Head circumference at follow-up was correlated with GA (rs = 0.40, p = 0.0012), neonatal IGF-1 (rs = 0.37, p = 0.0031), and early weight (rs = 0.27, p = 0.035). Conclusions:, In very preterm children, early and later postnatal growth is closely related to visual acuity and perception at follow-up. In addition, IGF-1 concentrations and early growth are correlated with head circumference and refraction at follow-up. [source] Technical Note: The effect of refractive blur on colour vision evaluated using the Cambridge Colour Test, the Ishihara Pseudoisochromatic Plates and the Farnsworth Munsell 100 Hue TestOPHTHALMIC AND PHYSIOLOGICAL OPTICS, Issue 3 2007Sri Thyagarajan Abstract The results of a prospective study examining the effect of refractive blur on colour vision performance in normal subjects measured with three different colour vision tests are reported. The Farnsworth Munsell 100 Hue (FM100) and Cambridge Colour Test (CCT) results were significantly affected at +6 D of spherical refractive blur, whereas those from the Ishihara Pseudoisochromatic Plate (IPP) test were not. In a clinical setting, correction of refractive error up to 3 D for colour vision testing with these tests may not be required. Poor colour vision should not be attributed solely to refractive causes of poor visual acuity (Snellen equivalent: >6/36). Fastest test times were achieved using IPP, followed by CCT. [source] 3413: Treatment options of macular edema in uveitisACTA OPHTHALMOLOGICA, Issue 2010Y GUEX-CROSIER Purpose To summarize current concepts on therapeutic approach in inflammatory cystoid macular edema (ICME). Methods A review of relevant literature concerning treatment options of ICME was performed. Results ICME is a major factor related to poor visual acuity in long term follow-up of uveitis. Topical corticosteroids administration has a minor therapeutic effect on ICME. Local therapies consist mostly of posterior sub-tenon's, intraocular corticosteroids injections or drug delivery systems. The effect of systemic corticosteroids, immunosuppressive agents or biological therapies will be discussed. Conclusion The recent development of drug delivery systems and biological therapies has considerably improved the prognosis of ICME. [source] Macular appearance after diabetic vitrectomy for fibrovascular proliferation: an optical coherence tomography studyACTA OPHTHALMOLOGICA, Issue 2 2010Chung-May Yang Abstract. Purpose:, To investigate morphological variations in the macular area with optical coherence tomography (OCT) after vitrectomy for diabetic fibrovascular proliferation. Methods:, We reviewed 108 cases using OCT 7,15 months after vitrectomy. Of these, 32 received OCT within 3 months postoperatively. Morphological variations were categorized and correlated with visual outcome. Results:, Only 24 cases (21.4%) had no obvious abnormalities. The most frequent findings were epiretinal membrane (52.8%), macular thickening (37.0%) and macular cysts (28.7%). Multivariate regression showed that diffuse macular thickening, loss of foveal depression and diffuse retinal thinning were significantly associated with poor visual acuity. Sequential OCT (< 3 and , 7 months) revealed that epiretinal membrane and oedema outside of fovea changed significantly between two examinations. Conclusion:, OCT may identify diverse morphological changes in the macular area after diabetic vitrectomy for fibrovascular proliferation. Macular appearance may change over time, and certain types of morphological changes may be associated with poor visual function. [source] Bacteria commonly isolated from keratitis specimens retain antibiotic susceptibility to fluoroquinolones and gentamicin plus cephalothinCLINICAL & EXPERIMENTAL OPHTHALMOLOGY, Issue 1 2006Cameron N Ly MB BS Abstract Purpose:, Patients presenting with presumed infective keratitis were studied to determine predisposing factors, the current susceptibilities of the bacterial isolates to a range of relevant antibiotics, the success rate of topical antibiotic treatment of keratitis and predictors of failure of topical therapy. Methods:, Corneal scrapings taken from patients who presented between January 2002 and December 2003 to the Sydney Eye Hospital Emergency Department with keratitis were cultured. The minimum inhibitory concentration of selected antibiotics was determined for each bacterial isolate using an agar dilution technique. Results:, One hundred and twelve consecutive patients presented with corneal ulcers. Forty-seven of the 112 (42%) patients had a growth from the corneal scraping. Potential predisposing factors were identified in 64% of patients, most frequently contact lens wear (36% of patients). Coagulase-negative staphylococci were the most common species isolated. Other common organisms isolated include Pseudomonas aeruginosa, Corynebacterium spp., Staphylococcus aureus and Streptococcus spp. Conclusions:, Most microorganisms isolated from patients with bacterial keratitis showed susceptibility to ciprofloxacin and aminoglycosides. Cephalothin plus aminoglycoside constituted an effective initial broad-spectrum antibiotic combination. The success rate of topical antibiotic treatment of corneal abscess is 89%. Predictors of failure include older age group, medium or large ulcer, culture-negative keratitis, hypopyon and poor visual acuity. [source] | ||||||||||