Bill Harvey: Optic disc assessment advice

This week I have mostly been thinking about… optic disc measurement (Fast Show reference there, for the more mature reader).

Last week I helped run a workshop on retinal photography. Attendees had to interpret a number of images and then decide how the image might have been improved upon, either by changes to the initial camera settings or by image enhancement after capture.

Most people know that you can adjust the flash setting, useful where media is less than transparent, and the background light setting, helpful for darker pigmented retinae for example. For younger, large-pupiled patients, a reduced flash is preferred. Fewer were aware of how images themselves can be enhanced by altering intensity and colour channels. All image software offers this.