Smartphone gallery

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For this series of images I used the EyePhoneDoc (Figure 1) and an LED positional backlighter which is flexible to position anywhere on a standard (that is, non-photographic) slit lamp (Figure 2). I downloaded an app called 'camera +' for less than £1. This enhances the autofocus and offers more options on light adjustment and focusing than the standard program included with the phone.

As I found before, it is worth spending a little time positioning the device as accurately as possible and then only a small circular image appears on the phone screen. Do not magnify at this stage as significant definition will be lost. Instead, focus and capture and then, in the camera + device, use the editing, brightness adjustment and cropping options to maximise the view of the image. Figure 3 shows an overview of an eye using simply the backlighter. Slit-lamp light here would cause local bleaching of the image. Figures 4a and 4b show early pinguecula and conjunctival hyperaemia (the patient had had a sleepless night prior to the examination). Figures 5a and b show with mixed success an attempt to capture the tear prism, either with a small known size light benchmark or without. Figure 6 a is simply a corneal section but underlines that the sensitivity of these cameras is actually rather good. Figure 6b is an attempt at capturing a van Herick view. Grading of a still image is much easier than on the live person. Figure 7 shows early lens brunescence. Any view behind the plane of the iris is best captured without the backlighter in place.