Abstract
<h3>To the Editor.</h3> —I would like to bring to the attention of our colleagues in ophthalmology a new instrument that I have found to be very adaptable for use in choroidoscopy.<sup>1</sup>It is the Nikon Wide-30 ophthalmoscope. The Nikon company advertises the scope for visualizing the retina through a widely dilated pupil, allowing a 30° erect view of the fundus. However, I have used the instrument successfully in performing choroidoscopy, in fiberoptics ophthalmodynamometry,<sup>2</sup>and in visualizing the fundus by transillumination through a miotic pupil.<sup>3</sup>The instrument performs eminently well in all three modalities. The light of the Wide-30 ophthalmoscope has, of course, to be turned off and a strong cold transillumination light is placed at the lateral canthus or sclera of the patient, which causes the pupil to glow. The instrument is held at a distance of about 17.8 cm in front of the patient's eye, so
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