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Purpose: To compare multicolor imaging (MCI) with Optos color fundus photography (OCFP) for the evaluation of morphology and extent of preretinal membranes in diabetic tractional retinal detachments (TRD).Methods: In this retrospective study, 30 eyes with diabetic TRDs were imaged using the MCI feature of the Heidelberg Spectralis Spectral-domain optical coherence tomography (SD-OCT) and color photo using the Optos Daytona ultra-widefield fundus camera. Two investigators independently graded and determined the agreeability between the two modalities with respect to the extent of the TRD and preretinal membranes on the SD-OCT B-scan images.Results: The MCI provided better visualization of the attachments and traction points of the posterior hyaloid face and preretinal membranes and is comparable to the SD-OCT B-scan images. The inter-rater agreeability rates for OCFP had a Kappa (κ) value of 0.37, while the MCI had a κ value of 0.46. When comparing between images of different wavelengths, grading using infrared reflectance (IR) had a poor agreement (-0.04 ± 0.04) while green reflectance (GR) (0.46 ± 0.32) and blue reflectance (BR) (0.53 ± 0.19) had a moderate agreement. The composite MCI and GR images also had comparatively higher intraclass coefficient when compared to the OCFP (0.25 [-0.09-0.55]) and IR (-0.03 [-0.39-0.34]) images.Conclusion: MCI is more sensitive for determining the extent of TRDs and for the detection of secondary membranes when compared to OCFP, thus, aiding in better surgical planning. [ABSTRACT FROM AUTHOR]

Purpose: To study the characteristics of focal choroidal excavation (FCE) in Indian eyes based on spectral-domain optical coherence tomography (SD-OCT) findings and their association with macular pathologies.Methods: Retrospective study of 26 patients diagnosed with FCE. All patients' clinical and imaging data were reviewed.Results: There were eight females and 18 males aged between 24 and 85 years. FCE was noted in 31 eyes of 26 patients - unilateral in 21 and bilateral in 5. The conforming type was noted in 13 and nonconforming in 19 eyes. The location was extrafoveal in 16 and subfoveal in 15 eyes. The morphology was bowl-shaped in 24, cone-shaped in six eyes, and mixed type in one eye. Associated pathologies were central serous chorioretinopathy in nine eyes, choroidal neovascular membrane in seven eyes, Stargardt's disease in three eyes, Best disease in four eyes, other retinal dystrophies in two eyes, polypoidal choroidal vasculopathy and moderate non-proliferative diabetic retinopathy, each in one eye. The mean FCE width was 1667.2 ± 817.7 μ, mean depth was 95.7 ± 46.4 μ, and the mean choroidal thickness under the FCE was 234.8 ± 85.9 μ. No abnormal choroidal tissue was found under any FCE.Conclusion: FCE is a relatively common entity and frequently associated with macular pathologies. The presence of an FCE did not alter the course or management of these conditions. [ABSTRACT FROM AUTHOR]

When secondary to an embolus, most common are cholesterol emboli from atheromatous plaques, platelet-fibrin emboli, calcific emboli from cardiac valvular disease, exogenous emboli in intravenous drug abusers or idiopathic.[[1]] The optical coherence tomography angiography [Figure 3] shows nonperfusion in the corresponding superficial plexus (arrow head) which correlates with the segmental hyperreflectivity of the inner retinal layers on the OCT BScan. Branch retinal artery occlusion, embolus, multimodal imaging. [Extracted from the article]