Visual field testing should be performed if a patient has symptoms of central vision loss, glaucoma or risk factors for glaucoma, symptoms of a neurological disease, symptoms or signs of a retinal disease, an abnormal repeatable screening, or if they are at risk for developing drug-related retinopathy such as from hydroxychloroquine use.

16. *when to perform visual field ??
a— symptoms suggesting centeral vision
loss .
b— glaucoma or risk factor for glaucoma .
c— symptom of neurological disease .
d _ symptoms and sign of retinal disease.
e_ Repeatable abnormal screening
f _a risk for developing drug _related
retinopathy (hydroxyl chloroquine).