Top tips for slit lamp imaging - part 3

Capturing a clear fluorescein image

Being able to capture high quality fluorescein images is important in order to document clinical findings such as corneal stain or to record the fluorescein fit of an RGP lens.

However, captured images often do not represent what is seen when viewed through the slit lamp oculars, with fine detail lost (Image A). To optimise fluorescein images, try these simple steps:

Use of the cobalt blue filter filters out a significant proportion of light. Therefore it is essential to adjust the rheostat to maximum brightness.

Use a slit lamp with an integrated Wratten filter which is wavelength matched to the cobalt blue filter. This will enhance the contrast of the green fluorescence by cutting out the reflected blue light (B).