This is the protocol for a review and there is no abstract. The objectives are as follows:
To determine the diagnostic accuracy of digital retinal imaging for diagnosing diabetic retinopathy.
mydriatic versus non-mydriatic pupils;
localisation of fields;
number of fields investigated;
observation angle per field;
monoscopic versus stereoscopic imaging;
multi-colour versus monochromatic mode;
training of evaluator (eye care professional like ophthalmologists or optometrists versus other);
nature of reference standard;
duration of diabetes mellitus;
type 1 diabetes mellitus versus type 2 diabetes mellitus.