Classification and Guidelines for Widefield Imaging: Recommendations from the International Widefield Imaging Study Group
The International Widefield Imaging Study Group reviewed a set of images from various manufacturers to help support the generation of the following definitions when describing the field of view of retinal images:
Widefield – centered on the fovea and includes the retina in
all four quadrants posterior to and including the vortex vein
Ultra-widefield – images showing retinal anatomy anterior
to the vortex vein ampullae in all four quadrants
Pan-retinal – ora to ora image of the retina either in the
horizontal or vertical direction
Peripheral Lesions Identified on Ultrawide Field Imaging Predict Increased Risk of Diabetic Retinopathy Progression over 4 Years.
optomap imaging has demonstrated that diabetic lesions occur in the retinal periphery in up to 50% of eyes and these lesions might result in a more severe grade of retinopathy in 10% of eyes. Eyes with predominantly peripheral lesions (defined as outside of ETDRS 7 standard field) had a 4.7 fold increased risk of progression to proliferative diabetic retinopathy (PDR). Eyes with predominantly peripheral lesions had a 3.2 fold risk of 2 step progression in DR.
Peripheral Changes Found in 97% of Patients with AMD Imaged with optomap in the Reykjavik and OPERA studies
Phenotyping the retinal periphery using the categories defined by the International Classification confirmed the presence of wide-ranging AMD-like pathologic changes (97%) even in those without central sight-threatening macular disease. Based on our observations, we propose here new, reliably identifiable grading categories that may be more suited for population-based UWFI.
Non-contact ultra-widefield imaging of retinopathy of prematurity using the Optos dual wavelength scanning laser ophthalmoscope.
The Optos ultra-widefield scanning laser ophthalmoscope is capable of acquiring clinically useful high-quality images of the fundus in ROP subjects. The imaging technique could potentially be used in monitoring ROP progression and documenting ROP regression following treatment.
A Review of Clinical Applications and Future Trends
Optos ultra-widefield imaging has become an essential tool for the identification of peripheral retinal and vascular pathology. The high resolution and multimodal capabilities of this device are also providing new insights into a variety of disorders, even those that primarily involve the posterior pole.