Confrontation visual field testing is an important part of a routine ophthalmological or neurological examination. It can be used for rapid and gross assessment of large-scale [[visual field]] problems due to ophthalmological or neurological diseases, such as [[Homonymous hemianopsia|homonymous]] and heteronymous hemianopias, [[quadranopsia]], altitudinal visual loss, central/centrocecal [[scotoma]] etc.<ref name="PEC">{{cite bookjournal |last1doi=David B10. |first1=Elliott |title=Clinical procedures in primary eye care |publisher=Elsevier1016/Butterworth Heinemann |isbn=9780750688963 |edition=3rd |year=2007 |chapter=Assessment of visual function |pages=68–69B978-0-7506-8896-3.50007-9 }}</ref><ref name="Johnson">{{cite journal |last1=Johnson |first1=L. N. |last2=Baloh |first2=F. G. |title=The accuracy of confrontation visual field test in comparison with automated perimetry |journal=Journal of the National Medical Association |date=October 1991 |volume=83 |issue=10 |pages=895–898 |pmid=1800764 |pmc=2571584 }}</ref> Test using a red target can detect red-desaturation, a sign of early [[optic nerve]] disease.<ref name="Broadway">{{cite journal |last1=Broadway |first1=David C |last2=Kyari |first2=Fatima |title=Examining visual fields |journal=Community Eye Health |date=2019 |volume=32 |issue=107 |pages=58–59 |pmid=32123478 |pmc=7041825 }}</ref>
