Browsing by Author "Freitas, C"
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- Characterization of all Surgical Specimens Provided by a Portuguese Department of Ophthalmology over a 13 Year PeriodPublication . Ferreira Mendes, J; Ferreira, AM; Freitas, CINTRODUCTION: We intend to evaluate clinically, topographically and morphologically all surgical specimens sent by the Department of Ophthalmology of Hospital de Braga to the Department of Pathology of the same hospital. MATERIAL AND METHODS: Two hundred and fifty eight surgically obtained specimens, from the Department of Ophthalmology of Hospital de Braga, analyzed in the Department of Pathology, from January 2002 to June 2015, were characterized. Data was arranged according to year, age, sex, topography and morphological diagnosis according to the SNOMED® coding system. RESULTS: Mean age at time of diagnosis was 54.6 years old; 52.3% were male subjects. The number of specimens was relatively stable until the year 2010, with a significant increase between 2011 and 2013. Most specimens sent corresponded to eyelid (54.7%), followed by conjunctiva (26.7%); the most common pathological diagnosis was malignant epithelial lesions (22.48%), followed by melanocytic tumours (22.09%) and benign epithelial lesions (17.05%). DISCUSSION: The results are distinct from previous publications presumably because of differences between the populations submitted to analysis. CONCLUSION: This is the first indexed publication characterizing surgical specimens from a Department of Ophthalmology in Portugal; moreover, it also includes an extensive review of global epidemiological data about ophthalmic surgical specimens.
- Comprometimento Visual com Dano Macular Mínimo numa Lesão Causada por Laser de FemtosegundoPublication . Ferreira-Mendes, J; Freitas, C; Gentil, RThe authors describe the case of a 26-year-old female patient with a history of bilateral central scotomas which has lasted 24 hours, which appeared after an injury caused by a plasma laser for the production of nanoparticles. The ophthalmologic assessment including observing the ocular fundis in mydriasis, fluorescein angiography and optical coherence tomography (OCT). In a first assessment, the visual acuity of the right eye was 20/20 and the left eye was 20/25. Foveal pigmentary alterations were observed in the macula of both eyes. Bilaterally, the OCT revealed a central interruption of the photoreceptor layer; the fluorescein angiography was normal. In subsequent assessments, the visual acuity was always 20/20 bilaterally. The abnormal findings observed in the OCT disappeared in less than five months, despite continued subjective complaints of scotomas in the left eye.
- A Endotropia na Miopia Axial: Caso ClínicoPublication . Sousa, K; Leite, R; Freitas, C; Vaz, F; Guimarães, S
- Eyelid Edema: A Rare Cause of a Common SignPublication . Soares, A; Almeida, C; Freitas, C; Sales-Sanz, M; Ribeiro, SWe report a 48-year-old female patient who presented to the emergency room with right eyelid edema, with 3 days of evolution. She had suffered minor trauma to this eye one week before. She reported episodes of right eyelid swelling of spontaneous resolution since the occurrence of a traumatic brain injury 5 years ago. Ophthalmological examination showed a soft and painless eyelid edema of the right eye. Brain computed tomography showed an area of bone discontinuity of the orbital roof with brain herniation and a CSF leak into the eyelid (blepharocele). Magnetic resonance confirmed the result of TC and revealed an area of frontal encephalomalacia. Ibuprofen (800 mg/day) was prescribed, with complete resolution within 20 days. She was evaluated by Neurosurgery with no indication of surgery due to the resolution of the edema and absence of symptoms. Blepharocele is a rare entity that should be considered in the differential diagnosis of unilateral eyelid edema. It can be secondary to an orbital fracture or congenital lesion.
- Normative Database of Optical Coherence Tomography Parameters in ChildhoodPublication . Queirós, T; Freitas, C; Guimarães, SINTRODUCTION: Optical coherence tomography is a technology that allows obtaining high resolution images of tissues in vivo, enabling the measurement of ocular structures, including the retinal nerve fiber layer and macular thickness. As a noninvasive test itâÄôs particularly useful in children, but its applicability is limited by the existence of normative values for adults only. PURPOSE: To establish the pediatric normative values of retinal nerve fiber layer thickness and macular thickness and to investigate its relationship with sex, age, refraction, eye side and ocular dominance. MATERIAL AND METHODS: Ophthalmologic examination and Cirrus HD-optical coherence tomography (Carl Zeiss Meditec) were carried out on 153 children aged 4 to 17 years old. RESULTS: We obtained a mean retinal nerve fiber layer average thickness of 97.90 μm. No significant differences were detected between genders, however the eye side and ocular dominance had significant influence on retinal nerve fiber layer thickness. Retinal nerve fiber layer thickness increased significantly with more positive refraction. With the Macular Cube 512 x 128 protocol we found that the average central subfield showed the smallest thickness (250.35 μm) and boys had higher macular thickness. DISCUSSION: The values of the retinal nerve fiber layer thickness and macular thickness obtained are comparable to recent studies. The distribution of retinal nerve fiber layer thickness in quadrants is in agreement with the normal distribution of retinal nerve fiber layer. Macular thickness proved to be higher in males (center field and inner ring), data consistent with previous studies. CONCLUSION: We establish the normative retinal nerve fiber layer thickness and macular thickness in healthy Portuguese children. These data enhance the evaluation and interpretation of parameters obtained by optical coherence tomography in the diagnosis of pediatric disorders in clinical practice.
- Oftalmopatia de Graves em idade pediátricaPublication . Monteiro, AM; Antunes, A; Martins, S; Freitas, C; Marques, O
- Predicting participation of people with impaired vision in epidemiological studiesPublication . Ramos, PL; Santana, R; Moreno, LH; Marques, AP; Freitas, C; Rocha-Sousa, A; Macedo, AFBACKGROUND: The characteristics of the target group and the design of an epidemiologic study, in particular the recruiting methods, can influence participation. People with vision impairment have unique characteristics because those invited are often elderly and totally or partially dependent on help to complete daily activities such as travelling to study sites. Therefore, participation of people with impaired vision in studies is less predictable than predicting participation for the general population. METHODS: Participants were recruited in the context of a study of prevalence and costs of visual impairment in Portugal (PCVIP-study). Participants were recruited from 4 Portuguese public hospitals. Inclusion criteria were: acuity in the better eye from 0.5 decimal (0.30logMAR) or worse and/or visual field of less than 20 degrees. Recruitment involved sending invitation letters and follow-up phone calls. A multiple logistic regression model was used to assess determinants of participation. The J48 classifier, chi-square and Fisher's exact tests were applied to investigate the possible differences between subjects in our sample. RESULTS: Individual cases were divided into 3 groups: immediate, late and non-participants. A participation rate of 20% was obtained (15% immediate, 5% late). Factors positively associated with participation included years of education, annual hospital attendance, and intermediate visual acuity. Females and greater distance to the hospital were inversely associated with participation. CONCLUSION: In our study, a letter followed by a phone call was efficient to recruit a significant number of participants from a larger group of people with impaired vision. However, the improvement in participation observed after the phone call might not be cost-effective. People with low levels of education and women were more difficult to recruit. These findings need to be considered to avoid studies whose results are biased by gender or socio-economic inequalities of their participants. Young subjects and those at intermediate stages of vision impairment, or equivalent conditions, may need more persuasion than other profiles.