Autofluorescence and Red Reflectance Imaging of Choroidal Nevus Using Ultra-Wide-Field Scanning Laser Ophthalmoscope

Abstract

 

Purpose

 

To evaluate the advantages of fundus autofluorescence (FAF) and red reflectance (RR) in ultra-wide-field scanning laser ophthalmoscope images of choroidal nevi.

 

Methods

 

Retrospective review of color, FAF and RR retinographies of 46 choroidal nevi.

 

Results

 

FAF was able to detect surface changes, but failed to detect the nevus outlines accurately. RR was superior to color fundus and FAF in delineating nevus boundaries and surface changes. In contrast, areas of RPE atrophy were more clearly delineated with FAF rather than with RR.

 

Conclusions

 

RR ultra-wide-field imaging seem to be more sensitive than color funds and FAF in delineating nevus boundaries and surface changes in choroidal nevi. On the other hand, FAF demarcates areas of RPE atrophy more accurately than RR and color fundus. RR and FAF should be considered useful complementary tools in the follow up of choroidal nevi.

 

 

Red reflectance image (red channel) using ultra-wide-field scanning laser ophthalmolscopy. A deeply pigmented nevus is located temporal to the macula. In addition, asteroid hyalosis appears as bright spots at an anterior plane.

 

 

Fundus Autofluorescence image (green channel) of the same eye shows an irregular hypo fluorescent area on the surface of the nevus, corresponding to retinal pigment epithelium atrophy. The nevus itself is barely detected.

 

Keywords: 452 choroid • 552 imaging methods (CT, FA, ICG, MRI, OCT, RTA, SLO, ultrasound) • 744 tumors