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AIM To report the outcome of treatment of non-invasive ocular surface squamous neoplasia (or conjunctival-corneal intra-epithelial neoplasia (CCIN)) where topical mitomycin C (MMC) has been used in the treatment regimen. DESIGN Prospective, non-comparative interventional case series. PARTICIPANTS 91 primary or recurrent CCIN lesions from 90 patients treated in a single ocular oncology centre over a 10.5-year period. INTERVENTION 73 cases of localised, non-invasive CCIN and eight cases of recurrent CCIN received a treatment regimen of surgical excision+/-cryotherapy, followed by two to three 1-week cycles of adjuvant topical MMC (0.04% four times a day). 10 cases of diffuse CCIN received two to three 1-week cycles of topical MMC (0.04% four times a day) as sole primary treatment. Main outcome measure Successful treatment was defined as no clinical recurrence of CCIN. RESULTS Mean follow-up of 56.8 months (range 5.8 to 119.8) and median 57.3 months, revealed no recurrences (0%) in the localised primary group, and one persistent case and two recurrences (30%) in the diffuse primary group. There was one recurrence (12.5%) in the recurrent group, but this was in the only eye with a diffuse type of recurrence. CONCLUSIONS MMC treatment following surgical excision appears to decrease the recurrence rate of localised CCIN and should be considered as adjuvant therapy in primary treatment. MMC should also be considered as adjuvant therapy in the treatment of localised recurrent disease. MMC may be used as sole therapy in more diffuse disease, but close ongoing follow-up is recommended in view of the significant risk of persistent or recurrent disease.
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Antibióticos Antineoplásicos/uso terapéutico , Carcinoma in Situ/tratamiento farmacológico , Neoplasias del Ojo/tratamiento farmacológico , Mitomicina/uso terapéutico , Adulto , Anciano , Anciano de 80 o más Años , Carcinoma in Situ/cirugía , Quimioterapia Adyuvante , Neoplasias de la Conjuntiva/tratamiento farmacológico , Neoplasias de la Conjuntiva/cirugía , Enfermedades de la Córnea/tratamiento farmacológico , Enfermedades de la Córnea/cirugía , Neoplasias del Ojo/cirugía , Femenino , Estudios de Seguimiento , Humanos , Masculino , Persona de Mediana Edad , Recurrencia Local de Neoplasia/tratamiento farmacológico , Recurrencia Local de Neoplasia/cirugía , Estudios Prospectivos , Resultado del TratamientoRESUMEN
PURPOSE: To determine risk factors for early angle-closure disease (AD) in a Burmese population. METHODS: A cross-sectional, population-based survey of the inhabitants, 40 years of age and over, from villages in the Meiktila District was performed; 2481 eligible participants were identified, 2076 participated in the study, and 2050 could be categorized as having early AD (defined by the presence of so-called occludable angles (<90 degrees of posterior trabecular meshwork visible on gonioscopy), but without glaucomatous optic neuropathy). The ophthalmic examination included Snellen visual acuity, slit-lamp examination, tonometry, gonioscopy, biometry, and dilated stereoscopic fundus examination. RESULTS: The mean axial length (AL) and anterior chamber depth (ACD) in those with occludable angles were 21.9 and 2.60 mm, respectively; in those with non-occludable angles, the corresponding lengths were 22.74 and 2.84 mm, respectively (P<0.001 for both comparisons). In the univariate analyses, age, female gender, nuclear and cortical cataract, steeper corneal curvature, more anterior lens position, and myopia were also significantly associated with occludability. In the multivariate analysis, age, AL, ACD, and nuclear cataract were significantly associated with occludability. CONCLUSION: In this Burmese population, those with occludable angles had significantly shorter ALs, ACDs, and thicker lenses than those without occludable angles. In multivariate analysis, increasing age, decreasing AL, decreasing ACD, and nuclear cataract were significant predictors of early AD. The presence of nuclear cataract per se should raise clinical suspicion of the possibility of AD in this population.
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Glaucoma de Ángulo Cerrado/epidemiología , Factores de Edad , Anciano , Cámara Anterior/patología , Córnea/patología , Estudios Transversales , Femenino , Glaucoma de Ángulo Cerrado/patología , Humanos , Cristalino/patología , Masculino , Persona de Mediana Edad , Mianmar , Miopía/epidemiología , Disco Óptico/patología , Retina/patología , Factores de Riesgo , Población Rural/estadística & datos numéricos , Factores Sexuales , Agudeza VisualRESUMEN
OBJECTIVE: To describe the ocular biometry and determinants of refractive error in an adult population in Myanmar. METHODS: A cross-sectional, population-based survey of the inhabitants 40 years of age and over from villages in the Meiktila District was performed; 2481 eligible participants were identified, and 2076 participated in the study. Biometric components including axial length (AL), anterior chamber depth (ACD), vitreous chamber depth (VCD), lens thickness (LT) and corneal curvature (CC) were measured. Lens opalescence was measured using the Lens Opacity Grading System III. Non-cycloplegic refraction was measured with an autorefractor. RESULTS: Complete biometric, refractive and lenticular data were available on 1498 participants. Men had longer ALs, ACDs, VCDs and steeper CCs than women. There was an increase in LT, nuclear opalescence (NO) and myopic shift with increasing age, with no significant change in AL with age. In the 40-59 year age group, VCD was a significant predictor of refractive error, but LT (p<0.001) and NO (p<0.001) were stronger predictors. In the 60+ age group, NO (p<0.001) was also the dominant predictor of refractive error. CONCLUSION: This Burmese population, particularly women, has a relatively short AL and ACD. NO is the strongest predictor of refractive error across all age groups in this population.
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Biometría/métodos , Catarata/etiología , Errores de Refracción/etiología , Adulto , Distribución por Edad , Factores de Edad , Anciano , Análisis de Varianza , Catarata/epidemiología , Estudios Transversales , Ojo/anatomía & histología , Femenino , Humanos , Modelos Lineales , Masculino , Persona de Mediana Edad , Mianmar/epidemiología , Errores de Refracción/epidemiología , Salud Rural , Factores SexualesRESUMEN
AIMS: The aim of this study was to report on the prevalence and correlates of pseudoexfoliation syndrome (PXF) in a rural Burmese population. METHODS: The study was a cross-sectional, population-based survey of the inhabitants > or =40 years in the Meiktila District. Ophthalmic examination included Snellen visual acuity, slit lamp examination, tonometry, gonioscopy, dilated fundus examination and frequency doubling perimetry. RESULTS: In a population of 2076 subjects (4016 eyes) the prevalence of PXF was 3.4% (95% CI 2.14 to 4.67%; 78 eyes). Twelve eyes with PXF were blind. In the univariate analysis, PXF was associated with: increasing age, blindness (odds ratio (OR) 4, 95% CI 1.84 to 8.68; p<0.0004), increasing intraocular pressure (IOP) (OR 1.08, 95% CI 1.04 to 1.11; p<0.00001), nuclear cataract (OR 6.92, 95% CI 2.89 to 16.59; p<0.00001), cortical cataract (OR 4.78, 95% CI 2.37 to 9.65; p<0.00001) and the presence of an occludable angle (OR 3.05, 95% CI 1.52 to 6.13; p<0.002). In the multivariate analysis, only increasing age and IOP remained significantly associated with PXF. CONCLUSIONS: The prevalence of PXF in the Burmese population is greater than previously reported in other East Asian populations. Increasing age and IOP are the strongest predictors of PXF, and it is associated with cataract, occludable angles and blindness.
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Síndrome de Exfoliación/epidemiología , Adulto , Distribución por Edad , Anciano , Ceguera/complicaciones , Catarata/complicaciones , Estudios Transversales , Síndrome de Exfoliación/etnología , Síndrome de Exfoliación/fisiopatología , Femenino , Glaucoma/complicaciones , Humanos , Presión Intraocular/fisiología , Masculino , Persona de Mediana Edad , Mianmar/epidemiología , Valor Predictivo de las Pruebas , Factores de Riesgo , Salud Rural , Tonometría Ocular/métodosRESUMEN
AIMS: To determine the prevalence of and risk factors for cataracts in a rural region of central Myanmar. METHODS: A cross-sectional, population-based survey of inhabitants >or=40 years of age from villages of central Myanmar; 2076 participated, and 2044 (82.3%) had an examinable lens in at least one eye. Data recording included smoking history, occupation, education level, betel-nut chewing, height and weight, and dilated lens assessment using Lens Opacities Classification System III grading: nuclear (>or=4), cortical (>or=2) and posterior subcapsular (>or=2) cataracts. Aphakic and pseudophakic eyes were included as operated cataracts for statistical analysis. RESULTS: The prevalence of any cataract including operated eyes was 40.39% (95% CI 37.30 to 43.48%): 27.35% nuclear, 20.91% cortical and 11.34% posterior subcapsular cataracts. No significant association was found between cataract and betel-nut use, gender, smoking or outdoor occupation. The likelihood of all cataract types increased with age (multivariate analysis including operated eyes: OR 1.154, CI 1.13 to 1.18, p<0.001). Low level of education and low body mass index were associated with nuclear cataracts. Large village size was associated with increased risk for nuclear cataract (OR 3.23, CI 1.989 to 5.250, p<0.001) and decreased risk for cortical cataract (OR 0.20, CI 0.08 to 0.47, p<0.001). CONCLUSIONS: The prevalence of cataract in rural Myanmar is similar to that in other developing Asian regions. Cataracts are strongly associated with increasing age, and are more common in those with lower education and lower body mass index.
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Catarata/epidemiología , Adulto , Factores de Edad , Anciano , Índice de Masa Corporal , Catarata/fisiopatología , Estudios Transversales , Escolaridad , Femenino , Humanos , Masculino , Desnutrición/complicaciones , Persona de Mediana Edad , Mianmar/epidemiología , Prevalencia , Factores de Riesgo , Salud Rural , Agudeza Visual/fisiologíaRESUMEN
PURPOSE: To determine the prevalence and risk factors for anisometropia in a rural adult population in central Myanmar. METHODS: A population-based ophthalmic survey was conducted in rural villages in central Myanmar. Ansiometropia was assessed in subjects with phakic eyes. The severity of anisometropia was defined as the absolute difference of the spherical equivalent between the two eyes. RESULTS: Prevalence of anisometropia (> or =1.0 D) in all participants was 35.3% (95% CI 32.7-37.9%); severe anisometropia (> or =2.0 D) was present in 18.9 % (95% CI 16.8-21.0%). There was no significant gender difference in anisometropia prevalence or severity. Prevalence and severity of anisometropia were significantly associated with age. Multiple logistic regression analysis revealed that cataract, myopia, but not age, were associated with anisometropia. The between-eye differences in axial length (r = 0.15, p < 0.001) and corneal curvature (r = 0.19, p < 0.001) were significantly correlated with the severity of anisometropia. CONCLUSIONS: Prevalence of anisometropia is relatively high in this rural adult population in Myanmar. Myopia and cataract, but not increasing age, are the potential risk factors of anisometropia in this population.
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Anisometropía/epidemiología , Población Rural/estadística & datos numéricos , Adulto , Distribución por Edad , Anciano , Anisometropía/etiología , Anisometropía/patología , Anisometropía/fisiopatología , Biometría , Catarata/complicaciones , Córnea/patología , Ojo/patología , Femenino , Humanos , Masculino , Persona de Mediana Edad , Mianmar/epidemiología , Miopía/complicaciones , Prevalencia , Factores de Riesgo , Índice de Severidad de la EnfermedadRESUMEN
OBJECTIVE: To determine the prevalence of refractive error and associated risk factors in the Meiktila District of central rural Myanmar. DESIGN: Population-based cross-sectional study. PARTICIPANTS: Randomized stratified cluster sampling of the inhabitants 40 years or older from villages in Meiktila was performed; 2481 eligible participants were identified, 2076 participated in the study, and adequate refractive data were obtained on 1863 individuals (75.1%). METHODS: Demographic data including age, gender, and education level were obtained from all participants. The ophthalmic examination included autorefraction, nuclear opalescence (NO) grading at the slit lamp, and applanation tonometry. MAIN OUTCOME MEASURES: Refractive errors were classified by type of ametropia and their prevalence was determined. Univariate and multivariate analyses were performed and odds ratios were calculated for the predictors of refractive error within the statistical models. RESULTS: Mean refractive error measured -1.3 diopters (D) (standard deviation [SD], 2.9) and mean cylindrical error measured 1.1 D (SD, 1.5). Myopia of >-1.0 and >-6.0 D occurred in 42.7% (95% confidence interval [CI], 40.4%-44.9%) and 6.5% (95% CI, 5.4%-7.6%) of subjects, respectively. Myopic refractive error was associated significantly with a higher degree of NO (P<0.001) and age. Hypermetropia of >+1.0 D occurred in 15% (95% CI, 5.4%-7.6%) of the population and was associated with higher education levels (P<0.001). Astigmatism worse than 1.0 D occurred in 30.6% (95% CI, 28.5%-32.7%) of the population and was associated with age (P<0.001) and NO (P<0.001). CONCLUSION: Myopia was more prevalent in older subjects and in those with increased NO. The prevalence rates of myopia in the > or =40 age group are higher than those found in other Asian regions and are likely to contribute to visual impairment.
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Errores de Refracción/epidemiología , Población Rural/estadística & datos numéricos , Adulto , Distribución por Edad , Anciano , Astigmatismo/epidemiología , Catarata/epidemiología , Comorbilidad , Estudios Transversales , Escolaridad , Femenino , Humanos , Masculino , Persona de Mediana Edad , Mianmar/epidemiología , Miopía/epidemiología , Oportunidad Relativa , Prevalencia , Factores de Riesgo , Distribución por SexoRESUMEN
AIM: To determine the prevalence of preglaucomatous angle-closure disease in central Myanmar. METHODS: A population-based survey of inhabitants >or=40 years in the Meiktila District was carried out; 2481 subjects were identified, 2076 participated and 2060 underwent gonioscopy of at least one eye. Eyes with angles traditionally described as "occludable" were recorded as primary angle-closure suspects (PACS); eyes with PACS and peripheral anterior synechiae (PAS), or an increased intraocular pressure but without primary angle-closure glaucoma, were recorded as primary angle closure (PAC). RESULTS: The prevalence of PACS in at least one eye was 5.7% (95% CI 4.72 to 6.62); prevalence increased with age and was more common in women (p<0.001). The prevalence of PAC in at least one eye was 1.50% (95% CI 1.47 to 1.53). All participants with PAS had at least 90 degrees of closure (range 90-360 degrees). CONCLUSION: The prevalence of preglaucomatous angle-closure disease (PACS and PAC) in this population was 5.7% and 1.5%, respectively. PACS was more common in women, and its prevalence increased with age.
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Glaucoma de Ángulo Cerrado/epidemiología , Gonioscopía , Adulto , Distribución por Edad , Anciano , Métodos Epidemiológicos , Femenino , Glaucoma de Ángulo Cerrado/diagnóstico , Humanos , Masculino , Persona de Mediana Edad , Mianmar/epidemiología , Salud Rural/estadística & datos numéricos , Índice de Severidad de la Enfermedad , Distribución por SexoRESUMEN
AIM: To determine the prevalence of glaucoma in the Meiktila district of central, rural Myanmar. METHODS: A cross-sectional, population-based survey of inhabitants > or =40 years of age from villages in Meiktila district, Myanmar, was performed; 2481 eligible participants were identified and 2076 participated in the study. The ophthalmic examination included Snellen visual acuity, slit-lamp examination, tonometry, gonioscopy, dilated stereoscopic fundus examination and full-threshold perimetry. Glaucoma was classified into clinical subtypes and categorised into three levels according to diagnostic evidence. RESULTS: Glaucoma was diagnosed in 1997 (80.5%) participants. The prevalence of glaucoma of any category in at least one eye was 4.9% (95% CI 4.1 to 5.7; n = 101). The overall prevalence of primary angle-closure glaucoma (PACG) was 2.5% (95% CI 1.5 to 3.5) and of primary open-angle glaucoma (POAG) was 2.0% (95% CI 0.9 to 3.1). PACG accounted for 84% of all blindness due to glaucoma, with the majority due to acute angle-closure glaucoma (AACG). CONCLUSION: The prevalence of glaucoma in the population aged > or =40 years in rural, central Myanmar was 4.9%. The ratio of PACG to POAG was approximately 1.25:1. PACG has a high visual morbidity and AACG is visually devastating in this community. Screening programmes should be directed at PACG, and further study of the underlying mechanisms of PACG is needed in this population.
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Glaucoma/epidemiología , Adulto , Distribución por Edad , Anciano , Estudios Transversales , Femenino , Glaucoma/diagnóstico , Glaucoma de Ángulo Cerrado/diagnóstico , Glaucoma de Ángulo Cerrado/epidemiología , Glaucoma de Ángulo Abierto/diagnóstico , Glaucoma de Ángulo Abierto/epidemiología , Humanos , Presión Intraocular , Masculino , Persona de Mediana Edad , Mianmar/epidemiología , Prevalencia , Salud Rural/estadística & datos numéricos , Distribución por SexoRESUMEN
OBJECTIVE: To determine the prevalence and causes of visual impairment in the Meiktila district of central, rural Myanmar. DESIGN: Population-based cross-sectional study. PARTICIPANTS: Random, stratified, cluster sampling of the inhabitants 40 years of age and older from villages in the Meiktila district was performed; 2481 eligible participants were identified and 2076 participated in the study. METHODS: The ophthalmic examination included presenting and pinhole Snellen visual acuity with an illiterate E chart, slit-lamp examination of the anterior segment, and dilated stereoscopic fundus examination. The principal cause of visual impairment was recorded. MAIN OUTCOME MEASURES: Visual impairment and blindness were defined by both presenting and corrected visual acuity according to World Health Organization criteria: better eye < 6/18 and < 3/60, respectively. RESULTS: Comprehensive examinations, including Snellen visual acuity, were performed on 2073 participants (83.6%) The prevalence estimate of presenting visual impairment was 40.4% (95% confidence interval [CI], 36.1-44.7) and of presenting blindness was 8.1% (95% CI, 6.5-9.9). After pinhole correction, the corresponding prevalences were 26.8% (95% CI, 23.5-30.1) and 5.3% (95% CI, 4.0-6.6). Cataract, uncorrected refractive error, and glaucoma were the most common causes of visual impairment. CONCLUSIONS: Visual impairment and blindness remain major public health problems in rural Myanmar. Specific programs directed toward reducing the cataract burden need to be implemented.
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Ceguera/epidemiología , Ceguera/etiología , Población Rural/estadística & datos numéricos , Personas con Daño Visual/estadística & datos numéricos , Adulto , Anciano , Catarata/complicaciones , Estudios Transversales , Femenino , Glaucoma/complicaciones , Humanos , Masculino , Persona de Mediana Edad , Mianmar/epidemiología , Prevalencia , Errores de Refracción/complicaciones , Agudeza Visual/fisiologíaRESUMEN
AIM: To determine the complications associated with mitomycin C (MMC) in the treatment of ocular surface neoplasia. METHODS: A retrospective and consecutive study of 100 eyes in 91 patients with ocular surface neoplasia treated with MMC in a single centre between November 1998 and January 2005. Outcome measures included complications of MMC and the treatment required for these complications. RESULTS: One to three 7 day cycles of topical MMC 0.04% four times a day were given to 59 eyes with localised corneal-conjunctival intraepithelial neoplasia (CIN), 19 eyes with diffuse CIN, six eyes with recurrent CIN, one eye with ocular surface squamous cell carcinoma, three eyes with primary acquired melanosis (PAM) with atypia, nine eyes with conjunctival malignant melanoma (MM), two eyes with sebaceous carcinoma with pagetoid spread, and one eye with recurrent atypical fibroxanthoma. Nine patients had bilateral CIN. 31 (34%) cases developed an allergic reaction to MMC and 14 (14%) eyes had epiphora secondary to punctal stenosis at a mean follow up period of 26.5 months. CONCLUSION: In the largest study looking at complications of topical MMC in the treatment of ocular surface neoplasia, allergic reaction and punctal stenosis are relatively common. Serious complications were not observed suggesting the safe use of MMC in mid-term follow up.
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Antibióticos Antineoplásicos/efectos adversos , Hipersensibilidad a las Drogas/etiología , Neoplasias del Ojo/tratamiento farmacológico , Mitomicina/efectos adversos , Adenocarcinoma Sebáceo/tratamiento farmacológico , Antibióticos Antineoplásicos/uso terapéutico , Carcinoma in Situ/tratamiento farmacológico , Carcinoma de Células Escamosas/tratamiento farmacológico , Neoplasias de la Conjuntiva/tratamiento farmacológico , Enfermedades de la Córnea/tratamiento farmacológico , Femenino , Estudios de Seguimiento , Histiocitoma Fibroso Benigno/tratamiento farmacológico , Humanos , Enfermedades del Aparato Lagrimal/inducido químicamente , Obstrucción del Conducto Lagrimal/inducido químicamente , Masculino , Melanoma/tratamiento farmacológico , Melanosis/tratamiento farmacológico , Mitomicina/uso terapéutico , Estudios RetrospectivosRESUMEN
INTRODUCTION: Aberrant facial nerve regeneration (AFR) following facial nerve palsy may give rise to ptosis because of increased orbicularis tone. We describe a series of patients presenting with ptosis where the underlying aetiology of AFR was often not recognized by the referring clinicians. METHODS: Retrospective case review. RESULTS: A total of 15 cases with ptosis, secondary to AFR, were seen at the Royal Adelaide Hospital Oculoplastic Clinic between 2000 and 2002. Of these, 10 (67%) were referred by general ophthalmologists. Ptosis was the only reason for referral in 11 patients (73%) and features of AFR or a past history of facial nerve palsy were not mentioned in seven referrals (overall 46%). All patients reported a previous facial palsy. The palpebral aperture was reduced on the affected side with reduction in both upper and lower margin reflex distance (MRD) by a mean of 1.5+/-0.7 mm (P<0.001) and 1.0+/-0.3 mm (P<0.001), respectively. The orbicularis tone was increased and strength reduced on the affected side in all patients. However, none had lagophthalmos. Signs of AFR were demonstrated in all patients with either an increase in ptosis or eyelid closure on the affected side during cheek puffing. CONCLUSION: Patients with AFR following facial nerve palsy may present with ptosis without recognition of the underlying aetiology. Signs of AFR ptosis include a decreased palpebral aperture with a reduced upper and lower MRD. The diagnosis can be established with demonstration of an increase in ptosis during cheek puffing. Recognition of AFR is important in these cases owing to the implications for management and post-operative patient satisfaction.
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Blefaroptosis/etiología , Enfermedades del Nervio Facial/complicaciones , Nervio Facial/fisiología , Parálisis Facial/complicaciones , Regeneración Nerviosa , Adulto , Anciano , Blefaroptosis/cirugía , Femenino , Humanos , Masculino , Persona de Mediana Edad , Derivación y Consulta , Estudios RetrospectivosRESUMEN
AIM: To report the outcome of topical mitomycin C (MMC) used as adjunctive treatment following primary excision of ocular surface squamous neoplasia (OSSN). METHOD: Prospective, non-comparative interventional case series of 27 primary OSSN lesions from 26 patients treated in a single ocular oncology centre over a 4 year period. RESULT: 27 cases of OSSN received a treatment regimen of surgical excision, followed by topical MMC. Mean follow up of 27 (SD 12) months (range 12-50, median 25 months) revealed zero recurrences. CONCLUSION: MMC treatment following surgical excision decreases the recurrence rate of primary ocular surface neoplasia and should be considered as adjunctive therapy in primary treatment.
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Antibióticos Antineoplásicos/uso terapéutico , Carcinoma in Situ/tratamiento farmacológico , Carcinoma de Células Escamosas/tratamiento farmacológico , Neoplasias del Ojo/tratamiento farmacológico , Mitomicina/uso terapéutico , Anciano , Anciano de 80 o más Años , Carcinoma in Situ/cirugía , Carcinoma de Células Escamosas/cirugía , Quimioterapia Adyuvante , Neoplasias del Ojo/cirugía , Femenino , Estudios de Seguimiento , Humanos , Masculino , Persona de Mediana Edad , Recurrencia Local de Neoplasia/prevención & control , Estudios ProspectivosRESUMEN
BACKGROUND: Steroid-induced ocular hypertension is generally attributed to alterations in the trabecular meshwork, reducing aqueous outflow. METHOD AND RESULTS: A case with several episodes of steroid-induced ocular hypertension is presented. Later, with unremitting intraocular pressures above 50 mmHg, despite maximal hypotensive medication, there is evidence of extensive failure of aqueous egress. A successful Molteno seton bypasses the failed trabecular meshwork to lower the pressure into the teens. The eye is then challenged with topical steroid on two occasions. The pressure rises, only to fall again with steroid withdrawal. CONCLUSION: Here is a case where the trabecular meshwork has been bypassed, but ocular hypertension was still induced with the application of topical steroid.