Long-wave digital imaging of the fundus

Currently fluorescein and indocyanine-green angiography (ICG) are standard procedures in the diagnosis of retinal and choroidal diseases that involve intravenous injection of contrast substance. However, imaging of the fundus without dye injection is playing an increasingly important role, especially when there is intolerance or risk related to injection of dye.

Photographing of the fundus with various light spectra, including infrared, was first reported by I Kugelberg.1 However, standard infrared devices and systems of infrared signal reception are unsuitable for fundus visualisation. This area of ophthalmology, as a potential source of additional information of eye fundus structures, is presently insufficiently developed and investigated.