Fundus imaging with a nasal endoscope

Abstract

Wide field fundus imaging is needed to diagnose, treat, and follow-up patients with retinal pathology. This is more applicable for pediatric patients as repeated evaluation is a challenge. The presently available imaging machines though provide high definition images, but carry the obvious disadvantages of either being costly or bulky or sometimes both, which limits its usage only to large centers. We hereby report a technique of fundus imaging using a nasal endoscope coupled with viscoelastic. A regular nasal endoscope with viscoelastic coupling was placed on the cornea to image the fundus of infants under general anesthesia. Wide angle fundus images of various fundus pathologies in infants could be obtained easily with readily available instruments and without the much financial investment for the institutes.

Figure 1

Posterior pole fundus photo obtained using the nasal endoscope

Figure 2

Nasal endoscope image of a partially regressed retinoblastoma along the superotemporal quadrant

Figure 3

Peripheral nasal endoscope fundus image showing multiple inactive vitreous seeds and partly regressed retinoblastoma

Figure 4

Nasal endoscope image of the angle

Figure 5

(a) Picture of the endoscope, (b) Picture of the assembled endoscope with the light pipe attached and connected to the light source