From Review of Optometry:
"There are many ocular diseases in which inflammation is a key factor, potentially leading to abnormalities in these ancillary tests. The two most common and relevant clinical scenarios are temporal arteritis and uveitis. Elevations in ESR and CRP levels, for example, are often diagnostic for temporal arteritis or polymyalgia rheumatica in conjunction with the clinical picture.12
Uveitis, pictured here, is one ocular condition with marked inflammation, which would be indicated upon ESR or CRP testing. Photo: Kyle D. Dohm, OD. Click image to enlarge. |
"Uveitis is a manifestation of numerous underlying systemic conditions, many of which would result in elevated ESR and/or CRP values. While uveitis in and of itself is inflammation, regardless of cause, studies have shown that first attacks of uveitis do not often lead to abnormal laboratory values. However, elevated levels of ESR and CRP suggest a systemic process causing uveitis. Further investigation has also attributed elevations in ESR to be due to autoimmune or collagen vascular disease etiologies, whereas abnormal CRP was more associated with trauma and infectious causes.3,13
"When taken together, both ESR and CRP laboratory tests can be helpful in the clinical setting. Understanding the nuances of each test and why they are measured will give the clinician the highest yield in the diagnosis and monitoring of diseases with inflammatory components."