Abstract
Purpose: :
Recently, fundus examination is becoming more important because detailed information can be obtained by using modern fundus examination equipments. F-10 (Nidek, Gamagori, Japan) is a scanning laser ophthalmoscope and has four different light sources and 8 different apertures. We determined the usefulness of noninvasive evaluation of diabetic retinal pathologies with the new indirect viewing system using scanning laser ophthalmoscope (SLO).
Methods: :
We examined diabetic macular edema (DME) and proliferative diabetic retinopathy (PDR) using SLO indirect viewing, a long wavelength laser (790 nm), and a new confocal aperture that is off-center from the optical axis (retro-mode). A spectral-domain optical coherent tomography (SD-OCT) was used to confirm the retinal pathology observed with retro-mode.
Results: :
The retinal vasculature was observed clearly with 532 nm green light. With the retro-mode, distribution of the cystoid spaces was so clearly shown on topographic imaging in DME. OCT was especially useful to know depth distribution of cystoids spaces, however, horizontal distribution was more easily understandable by the retro mode. Fibrovascular proliferation and vitreous changes were also seen clearly with retro-mode.
Conclusions: :
The SLO retro-mode is helpful for evaluating the precise retinal changes in diabetic retinopathy. Although OCT gives detailed information on retinal pathologies, the information by OCT is most useful to know vertical distribution in the retina. Simultaneous use of SLO such as F-10, allows more detailed observation of retinal diseases.
Keywords: diabetic retinopathy • imaging methods (CT, FA, ICG, MRI, OCT, RTA, SLO, ultrasound) • retina