Neopterin level can be measured by intraocular liquid biopsy.

Also, urinary NPt/creatinine ratio allowed to keep out any false positive results, as in renal failure, for intraocular NPt. Keywords: aqueous humour; neopterin; ophthalmology EN aqueous humour neopterin ophthalmology e20 e21 2 11/28/22 20230101 NES 230101 To the Editor, Neopterin (NPt) is a pteridine derivative synthesized by macrophages and monocytes upon activation by cytokines, mostly interferon-gamma, revealing a proinflammatory immune condition. [Extracted from the article]