Assessment of a computed tomography imaging spectrometer using an optimized expectation-maximization algorithm.

We designed and built a homemade computed tomography imaging spectrometer (CTIS) of 250×250pixels of spatial resolution and 2 nm spectral resolution. The optical design considers a CTIS optical array coupled to a digital reflex camera. We reconstructed the intensity spectra of a fluorescent source, the diffuse reflectance of a ColorChecker, and samples of Capsicum annuum of three different colors, using the expectation-maximization sequential algorithm, optimized utilizing an array of indices to reduce the reconstruction time. The results obtained with a ColorChecker indicate a high positive correlation of 0.9745 with an average residual difference of 1.31% concerning the spectra obtained with a commercial integrating sphere spectrometer. The feasibility of the proposed CTIS system shows how to detect and evaluate the physiological changes resulting from the decomposition of the green fruit of the Capsicum annuum in a range from 500 to 650 nm.

Two case reports of acute zonal occult outer retinopathy (AZOOR): Importance of multimodal diagnosis.

A presentation is made of two cases of acute zonal occult outer retinopathy (AZOOR); one a young man of 19 years, and the other a 42-year-old woman. The young man complained of unilateral scotoma and photopsia. The woman presented with bilateral visual loss and photopsia. Multimodal imaging, including fundus photography, fluorescein angiography, fundus autofluorescence, spectral-domain optical coherence tomography, and visual field testing, supported the diagnosis of AZOOR. The differential diagnosis is complicated, since it has clinical features in common with other retinopathies. This means that it is essential to use modern imaging tests, especially those where the characteristic trizonal pattern is shown, such as in autofluorescence and OCT.

Dos casos de retinopatía externa oculta zonal aguda: importancia del diagnóstico multimodal / Two case reports of acute zonal occult outer retinopathy (AZOOR): importance of multimodal diagnosis

Presentamos dos casos de retinopatía externa oculta zonal aguda (AZOOR). Un varón joven de 19 años de edad y una mujer de 47 años. El varón joven presentó inicialmente clínica unilateral de escotoma centrocecal y fotopsias. La sintomatología inicial de la mujer fue disminución de visión y fotopsias bilaterales. Los estudios realizados mediante imagen multimodal con fotografías del fondo de ojo, angiografía fluoresceínica, autofluorescencia de fondo, tomografía de coherencia óptica de dominio espectral y pruebas de campo visual fueron consistentes con el diagnóstico de AZOOR. El diagnóstico diferencial de esta patología es complicado, ya que comparte datos clínicos con otras retinopatías, por lo que resulta imprescindible apoyarse en las pruebas de imagen disponibles hoy en día, prestando especial atención a aquellas donde puede verse el patrón trizonal característico, como son la autofluorescencia y la OCT (AU)

A presentation is made of two cases of acute zonal occult outer retinopathy (AZOOR); a 19-year-old man, and the other a 42-year-old woman. The young man complained of unilateral scotoma and photopsia. The woman presented with bilateral visual loss and photopsia. Multimodal imaging, including fundus photography, fluorescein angiography, fundus autofluorescence, spectral-domain optical coherence tomography, and visual field testing, supported the diagnosis of AZOOR. The differential diagnosis is complicated, since it has clinical features in common with other retinopathies. This means that it is essential to use modern imaging tests, especially those where the characteristic trizonal pattern is shown, such as in autofluorescence and OCT (AU)

Flujo venoso trilaminar: más allá del fenómeno angiofluoresceingráfico / Trilaminar venous flow: Beyond the fluorescein angiography phenomenon

No disponible

Desprendimiento de retina neurosensorial macular asociado al uso de topiramato / Macular neurosensory retinal detachment associated with topiramate use

Mujer de 36 años diagnosticada de hipertensión intracraneal idiopática tratada con acetazolamida y topiramato, que presenta desprendimientos neurosensoriales retinianos. La paciente fue seguida durante 2 años estableciéndose una relación entre los desprendimientos neurosensoriales y el topiramato, con recurrencias tras la introducción del topiramato y mejoría tras la retirada del mismo. Estos hechos señalan al topiramato como posible responsable del cuadro. El topiramato podría ser responsable de la aparición de desprendimientos neurosensoriales de la retina y mácula. Aunque los casos de efusión cilio coroidea producidos por este fármaco son bien conocidos, sus efectos secundarios sobre la retina son menos frecuentes. Ya que se trata de un fármaco de amplio uso, tanto neurólogos como oftalmólogos deberían ser conscientes de sus posibles efectos secundarios

A 36 year-old woman with idiopathic intracranial hypertension was treated with topiramate and acetazolamide. The patient was followed-up for 2 years, with a relationship between neurosensory detachments and topiramate being established, with recurrences after the introduction of topiramato and improvement after its withdrawal. These findings point topiramate as a possible cause of the clinical picture. Topiramate may cause retinal and macular neurosensory detachments. Although the ciliochoroidal effusion cases caused by this drug are well-known, its retinal side effects are less common. As it is a widely used drug, neurologists and ophthalmologists should be aware of its possible ocular side effects

Análisis estructural macular bilateral tras síndrome de embolismo graso / Bilateral macular structural analysis after fat embolism síndrome

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Diagnóstico de enfermedad de Eales a partir de una membrana epirretiniana / Diagnosis of Eales disease from a macular epiretinal membrane

Presentamos el caso de un varón de 38 años, remitido a nuestro servicio por tracción vitreorretiniana y membrana epirretiniana asociada a pérdida de visión de 3 meses de evolución. Tras una exploración oftalmológica que incluyó el examen de la periferia retiniana, tomografía de coherencia óptica, prueba de tuberculina, interferon gamma release assay (IGRA) y estudio sistémico se llegó al diagnóstico de enfermedad de Eales. La afectación macular en pacientes con enfermedad de Eales es un hallazgo común, ya sea en forma de edema macular o membrana epirretiniana. Por ello, es aconsejable realizar un estudio macular mediante OCT. Por otra parte, el hallazgo de una membrana epirretiniana en un paciente joven debe hacernos pensar en una posible etiología no idiopática

Macular involvement is a common finding in patients with Eales disease. The purpose of this communication is to describe the diagnosis of Eales disease from the finding of a macular epiretinal membrane in a young patient. The case is presented of a 38-year-old man referred to this medical service unit with blurred vision developed over the past 3 months, and was associated with vitreoretinal traction and a macular epiretinal membrane. After an ophthalmological examination including the retinal periphery, optical coherence tomography, tuberculin test, interferon gamma release assay (IGRA), and a systemic study, the patient was diagnosed with Eales disease. Macular oedema or epiretinal membranes due to Eales disease are relatively common. Sd-OCT is recommended in all patients with Eales disease. On the other hand, the presence of epiretinal membranes in young patients usually suggests a non-idiopathic aetiology

Macular neurosensory retinal detachment associated with topiramate use. / Desprendimiento de retina neurosensorial macular asociado al uso de topiramato.

A 36 year-old woman with idiopathic intracranial hypertension was treated with topiramate and acetazolamide. The patient was followed-up for 2 years, with a relationship between neurosensory detachments and topiramate being established, with recurrences after the introduction of topiramato and improvement after its withdrawal. These findings point topiramate as a possible cause of the clinical picture. Topiramate may cause retinal and macular neurosensory detachments. Although the ciliochoroidal effusion cases caused by this drug are well-known, its retinal side effects are less common. As it is a widely used drug, neurologists and ophthalmologists should be aware of its possible ocular side effects.

Diagnosis of Eales disease from a macular epiretinal membrane. / Diagnóstico de enfermedad de Eales a partir de una membrana epirretiniana.

Macular involvement is a common finding in patients with Eales disease. The purpose of this communication is to describe the diagnosis of Eales disease from the finding of a macular epiretinal membrane in a young patient. The case is presented of a 38-year-old man referred to this medical service unit with blurred vision developed over the past 3 months, and was associated with vitreoretinal traction and a macular epiretinal membrane. After an ophthalmological examination including the retinal periphery, optical coherence tomography, tuberculin test, interferon gamma release assay (IGRA), and a systemic study, the patient was diagnosed with Eales disease. Macular oedema or epiretinal membranes due to Eales disease are relatively common. Sd-OCT is recommended in all patients with Eales disease. On the other hand, the presence of epiretinal membranes in young patients usually suggests a non-idiopathic aetiology.

Síndrome de despigmentación aguda bilateral de iris y transiluminación aguda bilateral de iris / Bilateral acute iris depigmentation and bilateral acute iris transillumination síndrome

Varón de 32 años que acude con un cuadro agudo bilateral caracterizado por visión borrosa, ojo rojo, fotofobia severa y dolor ocular tras un cuadro seudogripal. El paciente presentaba un cuadro con afectación bilateral caracterizado por pupilas en midriasis media, escasamente reactivas a la luz, transiluminación del iris, despigmentación difusa del estroma iridiano, dispersión de pigmento en la cámara anterior e hipertensión ocular. Tras el examen ocular se descartó un cuadro inflamatorio y un glaucoma pigmentario. El paciente presentaba características tanto de la despigmentación como de la transiluminación bilateral de iris. Ambas entidades podrían formar parte del espectro de la misma enfermedad

The case is presented of a 32 year-old male who arrived with acute bilateral symptoms with blurred vision, red eye, severe photophobia and severe ocular pain after suffering from a flu-like syndrome. The patient presented with a clinical picture of bilateral involvement characterised by pupils in mid-mydriasis, scarcely reactive to light, iris transillumination, diffuse depigmentation of the iridian stroma, pigment dispersion in the anterior chamber, and ocular hypertension. After the eye examination an inflammatory syndrome and pigmentary glaucoma were ruled out. The patient showed depigmentation characteristics as well as bilateral iris transillumination. Both conditions could form part of the spectrum of the same disease

Necrosis retiniana como manifestación de aspergilosis invasiva en un paciente tratado con ruxolitinib / Invasive aspergillosis manifesting as retinal necrosis in a patient treated with ruxolitinib

Varón de 30 años de edad con leucemia mieloblástica aguda y síndrome mielodisplásico secundario que desarrolló una enfermedad injerto contra huésped. El paciente fue tratado con ruxolitinib, un inhibidor de la Janus quinasa. A los 3 meses de haber iniciado el tratamiento se produjo una necrosis retiniana por Aspergillus, sin respuesta al tratamiento. El tratamiento con inhibidores de la Janus quinasa favorecería un aumento en la incidencia de infecciones oportunistas. El uso de estos fármacos podría dar lugar a una menor eficacia de los tratamientos empleados

A 30 year-old man with acute myeloblastic leukaemia and secondary myelodysplastic syndrome developed graft-versus-host disease. The patient was treated with ruxolitinib. After being treated for 3 months with ruxolitinib, an inhibitor of Janus kinase, he developed Aspergillus retinal necrosis resistant to common treatment. Treatment with Janus kinase inhibitors may lead to an increased incidence of opportunistic infections. Janus kinase inhibitor administration may result in poor treatment efficacy

Bilateral acute iris depigmentation and bilateral acute iris transillumination syndrome. / Síndrome de despigmentación aguda bilateral de iris y transiluminación aguda bilateral de iris.

The case is presented of a 32 year-old male who arrived with acute bilateral symptoms with blurred vision, red eye, severe photophobia and severe ocular pain after suffering from a flu-like syndrome. The patient presented with a clinical picture of bilateral involvement characterised by pupils in mid-mydriasis, scarcely reactive to light, iris transillumination, diffuse depigmentation of the iridian stroma, pigment dispersion in the anterior chamber, and ocular hypertension. After the eye examination an inflammatory syndrome and pigmentary glaucoma were ruled out. The patient showed depigmentation characteristics as well as bilateral iris transillumination. Both conditions could form part of the spectrum of the same disease.

Invasive aspergillosis manifesting as retinal necrosis in a patient treated with ruxolitinib. / Necrosis retiniana como manifestación de aspergilosis invasiva en un paciente tratado con ruxolitinib.

A 30 year-old man with acute myeloblastic leukaemia and secondary myelodysplastic syndrome developed graft-versus-host disease. The patient was treated with ruxolitinib. After being treated for 3 months with ruxolitinib, an inhibitor of Janus kinase, he developed Aspergillus retinal necrosis resistant to common treatment. Treatment with Janus kinase inhibitors may lead to an increased incidence of opportunistic infections. Janus kinase inhibitor administration may result in poor treatment efficacy.

Excavación focal coroidea asociada a membrana neovascular coroidea idiopática / Focal choroidal excavaction associated with idiopathic choroidal neovascularization

CASO CLÍNICO: Presentamos el caso de una mujer de 61 años, con una retinopatía de tipo Purtscher asociada a un fallo renal agudo. La exploración oftalmológica, angiografía fluoresceínica y tomografía de coherencia óptica fueron compatibles con una retinopatía de Purtscher-like. Las manifestaciones oculares precedieron al fracaso renal. El estudio sistémico y de laboratorio descartó su asociación con pancreatitis y otras enfermedades sistémicas. Finalmente se complicó con un glaucoma neovascular. DISCUSIÓN: La retinopatía de Purtscher-like rara vez precede a la enfermedad sistémica asociada. El diagnóstico precoz basado en las manifestaciones oftálmicas, podría contribuir al diagnóstico y tratamiento de la enfermedad de base y a la prevención de las posibles complicaciones

CASE REPORT: The case is reported of a 61 year-old woman with Purtscher-like retinopathy associated with acute renal failure. Ophthalmic examination, fluorescein-angiography, and optical coherence tomography were consistent with Purtscher-like retinopathy. Ophthalmic symptoms and signs preceded renal failure. Pancreatitis and other systemic diseases were ruled out. The patient developed a neovascular glaucoma. DISCUSSION: Purtscher-like retinopathy rarely precedes the associated systemic illness. Early diagnosis based on ophthalmic symptoms may help in the recognition and treatment of the disease, and prevent later complications

Retinopatía Purtscher-like previa a fallo renal agudo / Purtscher-like retinopathy preceding acute renal failure

CASO CLÍNICO: Presentamos el caso de una mujer de 61 años, con una retinopatía de tipo Purtscher asociada a un fallo renal agudo. La exploración oftalmológica, angiografía fluoresceínica y tomografía de coherencia óptica fueron compatibles con una retinopatía de Purtscher-like. Las manifestaciones oculares precedieron al fracaso renal. El estudio sistémico y de laboratorio descartó su asociación con pancreatitis y otras enfermedades sistémicas. Finalmente se complicó con un glaucoma neovascular. DISCUSIÓN: La retinopatía de Purtscher-like rara vez precede a la enfermedad sistémica asociada. El diagnóstico precoz basado en las manifestaciones oftálmicas, podría contribuir al diagnóstico y tratamiento de la enfermedad de base y a la prevención de las posibles complicaciones

CASE REPORT: The case is reported of a 61 year-old woman with Purtscher-like retinopathy associated with acute renal failure. Ophthalmic examination, fluorescein-angiography, and optical coherence tomography were consistent with Purtscher-like retinopathy. Ophthalmic symptoms and signs preceded renal failure. Pancreatitis and other systemic diseases were ruled out. The patient developed a neovascular glaucoma. DISSCUSIÓN: Purtscher-like retinopathy rarely precedes the associated systemic illness. Early diagnosis based on ophthalmic symptoms may help in the recognition and treatment of the disease, and prevent later complications

Afectación retiniana tras inyección accidental intravítrea de mepivacaína y epinefrina / Retinal toxicity after accidental intravitreal injection of mepivacaine and adrenaline

Caso clínico: Varón de 32 años sin antecedentes de interés que sufre accidente de tráfico con trauma craneoencefálico leve, con herida inciso-contusa supraciliar izquierda que se extiende al párpado superior izquierdo sin pérdida de visión. Tras la inyección anestésica palpebral se produjo disminución de agudeza visual súbita del ojo izquierdo e hiposfagma localizado entre la I-III a 4 mm del limbo, con aumento de la presión intraocular. En el fondo de ojo se observó una lesión blanquecina con un punto hemorrágico central que se correspondía con el área del hiposfagma. Discusión: La infiltración anestésica durante la reparación palpebral puede complicarse con la penetración inadvertida del globo ocular. La mepivacaína y epinefrina intravítreas pueden causar lesiones maculares y retinianas por sí solas, así como por el aumento súbito de la presión intraocular (AU)

Case report: The case is presented of a 32 year-old male with no medical history of interest who suffered a traffic accident with mild traumatic brain injury. He had a left supraciliary incised and contused wound that extended to the left upper eyelid, with no loss of vision. After palpebral anaesthetic injection, there was a sudden visual acuity decrease in the left eye and hyposphagma located between I-III at 4 mm from the limbus, with increased intraocular pressure. A whitish lesion with a central haemorrhagic focus was observed in the ocular fundus, corresponding to the area where the hyposphagma was located. Discussion: Anaesthetic injection during palpebral repair may be complicated by inadvertent penetration of the eyeball. Intravitreal mepivacaine and adrenaline could cause macular and retinal lesions (AU)

Síndrome de nefritis túbulo-intersticial y uveítis (TINU). Tratamiento con inmunosupresores / Tubulointerstitial nephritis and uveitis syndrome (TINU). Treatment with immunosuppressive therapy

CASO CLÍNICO: Presentamos 2 casos de síndrome de nefritis túbulo-intersticial y uveítis que necesitaron tratamiento con inmunosupresores para lograr el control de la uveítis. Al contrario de lo habitualmente descrito, la uveítis adquirió un carácter crónico, siendo necesario el tratamiento inmunosupresor. La nefritis sí respondió al tratamiento con corticoides. DISCUSIÓN: El síndrome de nefritis túbulo intersticial y uveítis constituye una condición infradiagnosticada que requiere un alto índice de sospecha diagnóstica, ya que no se acompaña de alteraciones específicas. La inflamación ocular cursa con frecuentes recurrencias, siendo necesario, en raras ocasiones, el tratamiento inmunosupreso

CASE REPORT: Two cases of tubulointerstitial nephritis and uveitis are presented. Immunosuppressive therapy was required to control the uveitis. Contrary to that usually described, uveitis became chronic, which made immunosuppressive therapy necessary. Nephritis was successfully treated with steroids. DISCUSSION: Tubulointerstitial nephritis and uveitis syndrome is an under-diagnosed disorder and requires clinical suspicion due to there being no specific laboratory study available. Recurrences and relapses of ocular inflammation are common. Immunosuppressive therapy is not often needed