Comparisons of Effective Fields of Two Ultra-Widefield Ophthalmoscopes, Optos 200Tx and Clarus 500

Figure 1

Representative retinal images recorded with a viewing angle of 200° in the horizontal plane by the Optos 200Tx and Clarus 500; two ultra-widefield ophthalmoscopes, from the same patient (normal subject, 40-year-old man). A single image obtained by the Optos (a) and a montage image created by the two images of the Clarus (b) are shown. Magnified views of the area outlined by a dashed white line are shown in the right panels. We noted that the blood vessels of the peripheral retina appear to be more blurred in the Clarus image than the Optos image. Black arrows also indicate the center of the image.

(a)

(b)