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Introduction
Screening Schedule and Flow Chart
How the Eye Photo Service Works
How to Find Us
How to Grade Diabetic Retinopathy
Before Sending a Patient
Why Screen for Diabetic Retinopathy?
Retinal Photography for Diabetic Retinopathy Screening
More Resources

Before Sending a Patient

Not all eyes are amenable to obtaining good quality retinal photographs. Adequate photography may not be possible with:
  • small pupils of <3.5 mm in dim light
  • significant media opacity from, for instance, cataracts and vitreous haemorrhage.

A quick and easy way to check for this is by doing a red reflex test.  Watch video


Good pupil size and a good red reflex
– photos likely to be good
>>> red reflex test <<< Absent red reflex from significant media opacity
– a good photo will not be possible

In such situations, a direct referral to an eye clinic is the preferable option, to spare the patient an unproductive trip for retinal photography.