Improved predictive diagnosis of diabetic macular edema based on hybrid models: An observational study.

Diabetic Macular Edema (DME) is the most common sight-threatening complication of type 2 diabetes. Optical Coherence Tomography (OCT) is the most useful imaging technique to diagnose, follow up, and evaluate treatments for DME. However, OCT exam and devices are expensive and unavailable in all clinics in low- and middle-income countries. Our primary goal was therefore to develop an alternative method to OCT for DME diagnosis by introducing spectral information derived from spontaneous electroretinogram (ERG) signals as a single input or combined with fundus that is much more widespread. Baseline ERGs were recorded in 233 patients and transformed into scalograms and spectrograms via Wavelet and Fourier transforms, respectively. Using transfer learning, distinct Convolutional Neural Networks (CNN) were trained as classifiers for DME using OCT, scalogram, spectrogram, and eye fundus images. Input data were randomly split into training and test sets with a proportion of 80 %-20 %, respectively. The top performers for each input type were selected, OpticNet-71 for OCT, DenseNet-201 for eye fundus, and non-evoked ERG-derived scalograms, to generate a combined model by assigning different weights for each of the selected models. Model validation was performed using a dataset alien to the training phase of the models. None of the models powered by mock ERG-derived input performed well. In contrast, hybrid models showed better results, in particular, the model powered by eye fundus combined with mock ERG-derived information with a 91 % AUC and 86 % F1-score, and the model powered by OCT and mock ERG-derived scalogram images with a 93 % AUC and 89 % F1-score. These data show that the spontaneous ERG-derived input adds predictive value to the fundus- and OCT-based models to diagnose DME, except for the sensitivity of the OCT model which remains the same. The inclusion of mock ERG signals, which have recently been shown to take only 5 min to record in daylight conditions, therefore represents a potential improvement over existing OCT-based models, as well as a reliable and cost-effective alternative when combined with the fundus, especially in underserved areas, to predict DME.

Evaluation of an AI system for the detection of diabetic retinopathy from images captured with a handheld portable fundus camera: the MAILOR AI study.

OBJECTIVES: To evaluate the performance of an artificial intelligence (AI) system (Pegasus, Visulytix Ltd., UK*) at the detection of diabetic retinopathy (DR) from images captured by a handheld portable fundus camera. METHODS: A cohort of 6404 patients (~80% with diabetes mellitus) was screened for retinal diseases using a handheld portable fundus camera (Pictor Plus, Volk Optical Inc., USA) at the Mexican Advanced Imaging Laboratory for Ocular Research. The images were graded for DR by specialists according to the Scottish DR grading scheme. The performance of the AI system was evaluated, retrospectively, in assessing referable DR (RDR) and proliferative DR (PDR) and compared with the performance on a publicly available desktop camera benchmark dataset. RESULTS: For RDR detection, Pegasus performed with an 89.4% (95% CI: 88.0-90.7) area under the receiver operating characteristic (AUROC) curve for the MAILOR cohort, compared with an AUROC of 98.5% (95% CI: 97.8-99.2) on the benchmark dataset. This difference was statistically significant. Moreover, no statistically significant difference was found in performance for PDR detection with Pegasus achieving an AUROC of 94.3% (95% CI: 91.0-96.9) on the MAILOR cohort and 92.2% (95% CI: 89.4-94.8) on the benchmark dataset. CONCLUSIONS: Pegasus showed good transferability for the detection of PDR from a curated desktop fundus camera dataset to real-world clinical practice with a handheld portable fundus camera. However, there was a substantial, and statistically significant, decrease in the diagnostic performance for RDR when using the handheld device.

Endoftalmitis endógena durante el embarazo: a propósito de un caso / Endogenous endophthalmitis during pregnancy: Case report

La endoftalmitis endógena es una enfermedad que amenaza potencialmente la visión en los pacientes que la presentan. Es producida por la diseminación hematógena de microorganismos desde un foco séptico y se trata de una entidad poco frecuente que se relaciona con enfermedades debilitantes, estados de inmunosupresión y procedimientos invasivos. La endoftalmitis endógena durante el embarazo es aún más rara y se ha convertido en un desafío por la seguridad y efectos secundarios de los tratamientos locales y sistémicos que requiere para su manejo. Presentamos el caso de una mujer embarazada con antecedente de apendicitis complicada, shock séptico y trombocitopenia, con endoftalmitis endógena por Candida albicans en el postoperatorio, que requirió aplicación de antimicóticos intravítreos, sistémicos y vitrectomía, con una recuperación visual y anatómica importante, sin efectos secundarios maternos y ni fetales

Endogenous endophthalmitis is a disease that potentially threatens vision. It is produced by the haematogenous spread of microorganisms from a septic focus. It is a rare condition that is related to debilitating diseases, immunosuppression states, and invasive procedures. Endogenous endophthalmitis during pregnancy is even rarer, and has become a challenge due to the safety and side effects of the local and systemic treatments. The case is presented of a pregnant woman with a history of complicated appendicitis, septic shock, and thrombocytopenia that presented endogenous endophthalmitis due to Candida albicans in the immediate post-operative period. This required the use of intravitreal and systemic antimycotics and vitrectomy. She made a significant anatomical and functional recovery, and without any maternal or foetal side effects

Endogenous endophthalmitis during pregnancy: Case report. / Endoftalmitis endógena durante el embarazo: a propósito de un caso.

Endogenous endophthalmitis is a disease that potentially threatens vision. It is produced by the haematogenous spread of microorganisms from a septic focus. It is a rare condition that is related to debilitating diseases, immunosuppression states, and invasive procedures. Endogenous endophthalmitis during pregnancy is even rarer, and has become a challenge due to the safety and side effects of the local and systemic treatments. The case is presented of a pregnant woman with a history of complicated appendicitis, septic shock, and thrombocytopenia that presented endogenous endophthalmitis due to Candida albicans in the immediate post-operative period. This required the use of intravitreal and systemic antimycotics and vitrectomy. She made a significant anatomical and functional recovery, and without any maternal or foetal side effects.

Amiloidosis vítrea como manifestación primaria de enfermedad: reporte de caso / Vitreous amyloidosis as primary manifestation of disease: case report

Mujer de 35 años con disminución progresiva de visión en ambos ojos sin otros síntomas asociados manifestó como único antecedente la muerte de su hermano por amiloidosis. La agudeza visual fue de cuenta dedos a 30 centímetros en el ojo derecho y 20/70 en el ojo izquierdo. En la oftalmoscopia del ojo derecho se observó un vítreo blanco, homogéneo que no permitió valorar detalles y en el ojo izquierdo un vítreo blanquecino con opacidades en forma de bandas en la región cortical. Se realizó vitrectomía en el ojo derecho y estudio con inmunotinciones que fueron positivos para material amiloide. Publicamos un caso de amiloidosis diagnosticada con tinciones específicas en muestra vítrea cuya manifestación inicial y única fue la presencia de opacidades vítreas. El procesamiento de estas muestras debe considerarse en pacientes con antecedentes familiares, opacidades vítreas tempranas, resultados negativos de biopsia sistémica o curso atípico de la enfermedad

A 35-year-old woman with progressive decrease of vision in both eyes and with no other associated symptoms, manifested as the only antecedent, the death of her brother due to amyloidosis. The visual acuity was counting fingers at 30 centimetres in the right eye and 20/70 in the left eye. In ophthalmoscopy of the right eye, a white, homogeneous vitreous, that was difficult to assess in detail, was observed, and in the left eye a whitish vitreous with band-like opacities in the cortical region. Vitrectomy was performed in the right eye, and a study with specific stains showed positive for amyloid material. A case is reported of amyloidosis diagnosed with specific stains in a vitreous sample for which the initial and only manifestation was the presence of vitreous opacities. The processing of these samples should be considered in patients with family history, early vitreous opacities, negative results of systemic biopsy, or atypical course of the disease

Vitreous amyloidosis as primary manifestation of disease: case report. / Amiloidosis vítrea como manifestación primaria de enfermedad: reporte de caso.

A 35-year-old woman with progressive decrease of vision in both eyes and with no other associated symptoms, manifested as the only antecedent, the death of her brother due to amyloidosis. The visual acuity was counting fingers at 30 centimetres in the right eye and 20/70 in the left eye. In ophthalmoscopy of the right eye, a white, homogeneous vitreous, that was difficult to assess in detail, was observed, and in the left eye a whitish vitreous with band-like opacities in the cortical region. Vitrectomy was performed in the right eye, and a study with specific stains showed positive for amyloid material. A case is reported of amyloidosis diagnosed with specific stains in a vitreous sample for which the initial and only manifestation was the presence of vitreous opacities. The processing of these samples should be considered in patients with family history, early vitreous opacities, negative results of systemic biopsy, or atypical course of the disease.