The American Academy of Ophthalmology (AAO) recommends that an ophthalmologist (eye care disorder specialist) check Plaquenil patients for retinal toxicity with photos and the following tests:
a visual field test to check if blind spots have developed
OCT imaging, three-dimensional photography done to look for early retinal damage
a multifocal test (electroretinography) to see any retinal decay and how the cells respond to light