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The screening episode—visual acuity, mydriasis, and digital photography 

The screening episode—visual acuity, mydriasis, and digital photography
Chapter:
The screening episode—visual acuity, mydriasis, and digital photography
Author(s):

David Roy

and Jane Pitt

DOI:
10.1093/med/9780199544967.003.0010
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date: 21 September 2019

Digital retinal photography has completely revolutionized the accurate detection of diabetic retinopathy (DR), allowing precise diagnosis and resulting in timely and appropriate referral to diabetic eye specialists.

Accurate measurement of visual acuity (VA) followed by adequate pupil dilatation (mydriasis) is an integral part of a DR screening episode.

A visual history is essential to record, as this may affect the clinical outcome of screening.

Obtaining digital retinal photographs (images) of acceptable quality to grade, with a low ungradable rate (< 10%), is imperative.

Practice and expertise is needed to ensure avoidance of the pitfalls of digital photography.

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