|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.
|Good pupil size and a good red reflex
– photos likely to be good
||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.